CISA updated its KEV entry on September 10, 2026 to confirm that CVE-2025-14733, an unauthenticated RCE in the WatchGuard Firebox iked process patched back in December 2025, is now used in ransomware attacks. With nearly 9,000 Fireboxes still exposed online, check your Fireware OS version and hunt for the indicators of compromise before the encryption starts.

Microsoft documents attacks in which ShinyHunters and Helix-linked gangs impersonate the help desk to steer employees toward passkey-themed phishing pages, then exfiltrate Microsoft 365 data. The defense rests less on the passkey itself than on phishing-resistant authentication and session revocation.

On September 9, 2026, Cisco confirmed that CVE-2026-20079, a CVSS 10.0 authentication bypass in Secure Firewall Management Center, is being actively exploited, even though a patch has existed since March. Network teams must patch immediately, then hunt for indicators of compromise before declaring a device healthy.

Patched in January 2026, the CVE-2025-25249 heap overflow in the FortiOS cw_acd daemon has resurfaced exploited in the wild: CISA added it to the KEV catalog on September 9, 2026, after SOCRadar observed the PivotC2 RAT deployed on 178 devices. Network teams must upgrade exposed FortiOS trains before September 12, then strip out unnecessary fabric access.

On September 9, 2026, researcher Chaotic Eclipse published ShieldCrash, a proof of concept that bypasses CVE-2026-69414 (ShieldBreak), the privilege-escalation flaw Microsoft claimed to have patched in Defender’s antimalware engine. Check your Malware Protection Engine version and treat the EDR itself as attack surface to monitor.

On September 9, 2026, SAP shipped fixes for four critical flaws, including CVE-2026-44756 (CVSS 10.0), a memory-corruption bug in Extended Passport processing that yields unauthenticated remote code execution across three protocols at once. Basis teams should patch the SAP kernel first, ahead of any network segmentation effort.

On September 2, 2026, Dropbox disclosed that an attacker accessed roughly 5,000 accounts by abusing a flaw in Lenovo’s email-verification process to register fraudulent Lenovo IDs — never needing the victim’s Dropbox password. Audit every identity-federation link you accept and require re-authentication on SSO sign-ins.

The September 8, 2026 Patch Tuesday breaks a record with 964 CVEs, including two zero-days already exploited in the wild, CVE-2026-81963 and CVE-2026-85880. Triage the bulletin by exploitability — zero-days first, then internet-facing RCEs — rather than by raw score.

Check Point unpacks JSCeal, a compiled V8 JavaScript malware that replays stolen session cookies to open access to Google accounts without a password or second factor. Lock down sessions with security keys and device-bound credentials, and watch for cookie exfiltration.

N-able publishes an emergency hotfix for CVE-2026-86218, a pre-authentication remote code execution flaw (CVSS 10.0) in its N-central RMM platform, which Huntress researchers say they have seen actively exploited. Update self-hosted instances to 2026.3 HF4 and segment your RMM from the rest of the network.

Broadcom patched two flaws in VMware Workstation and Fusion: CVE-2026-59346 (CVSS 9.3) and CVE-2026-59347 both let a virtual machine administrator execute code on the host machine. Update to 26H1u1 now — no workaround exists.

A researcher releases FalconFlank, a zero-day that abuses CrowdStrike Falcon’s Office macro remediation to gain SYSTEM privileges on fully patched Windows 11 and Server machines. Disable the suspicious macro removal policy until an official fix lands.

Disclosed on August 11, 2026, CVE-2026-62911 lets an attacker with some access replay a captured authentication to elevate privileges on Microsoft Exchange, and a public PoC is already circulating. Nearly 22,000 servers were still exposed at the end of August; if you are on Exchange 2016 without ESU, the fix is not an option — migration is.

Sansec documents StyleSmuggler, a Magento and Adobe Commerce zero-day exploited since September 4, 2026 that runs code without authentication through the template engine and installs a persistent backdoor. Adobe has published no CVE and no patch yet: disable GraphQL on your stores while waiting for the September 8 bulletin.

On September 2, 2026, CISA added CVE-2026-49869 to its KEV catalog: a CVSS 10 command injection in the open-source orchestrator Kestra, caused by a path comparison that lets any endpoint ending in ’configs’ through. Move to 1.0.45 or 1.3.21 before the September 5 federal deadline, then check whether the instance was already used as an entry point.

On September 4, 2026, Google shipped an emergency Chrome update fixing CVE-2026-85046, a type confusion in the V8 engine already exploited in the wild and rated 8.8 on the CVSS scale. Update to Chrome 152.0.7977.82 or later and check every Chromium browser in your fleet, including Edge, Brave and Opera.

Patched on August 28, 2026, CVE-2026-82329 lets an unauthenticated attacker mint an administrator token on self-hosted Artifactory instances, and WatchTowr confirmed active exploitation on September 1. Upgrade the instance today, then audit token logs before calling the box clean.

Manifold Security disclosed on 2 September 2026 eight flaws across seven CLI coding agents: a repository delivered as an archive can trigger a local command on open, outside the sandbox and without approval, via Git’s core.fsmonitor setting. Disable core.fsmonitor by default and inspect .git/config before opening a received folder with an agent.

On September 1, 2026, VulnCheck observed mass exploitation of CVE-2026-0768, an unauthenticated remote code execution flaw in Langflow, used to harvest OpenAI and AWS keys from exposed instances. It is the sixth Langflow flaw exploited since January: any instance patched below 1.11.6 must be treated as compromised.

On September 1, 2026, SonicWall disclosed two flaws in the SMA 1000 line — a pre-authentication SSRF (CVE-2026-83548, CVSS 10) and an OS command injection (CVE-2026-83549) — already chained in the wild to reach remote code execution without credentials. Apply the hotfix now, and if compromise is confirmed, re-image the appliance instead of patching over the intrusion.

On August 31, 2026, Sygnia documented how the Chinese espionage group Fire Ant, which heavily overlaps UNC3886, pivoted from VMware hypervisors to Cisco IOS XR routers to intercept the traffic passing through them. An active GRE tunnel missing from the running config is enough to turn a transit router into a collection platform — and it means defenders must audit routers as vantage points, not as mere hops.

On September 1, 2026, Kaspersky detailed two cross-platform RATs, NodeRabbit and PollCat, delivered to developers as rigged recruitment challenges. The job-interview coding test is now an attack surface, and the trap sits in the node_modules that ships with the challenge.

On August 27, 2026, PaperCut confirmed active exploitation of two zero-days in its NG and MF print management products, chained into unauthenticated code execution. The first emergency patch was already bypassed: apply the second version and cut internet access.

On August 30, 2026, Anthropic warned users that infostealers had stolen their active Claude sessions to consume their usage. A stolen session cookie bypasses both password and 2FA — and paid AI accounts are becoming a monetization target in their own right.

On August 29, 2026, LockBit 5.0 listed the healthcare administrator American Plan Administrators on its leak site, three weeks after targeting US Bank with a September 3 deadline. A claim is not a confirmed breach, but it is already real pressure: here is how to handle it.

On August 30, 2026, the gitoxide project — the pure-Rust implementation of Git — shipped a bundled fix for five parsing vulnerabilities, including an HTTP credential leak and several submodule-based path traversals. The lesson for anyone pulling Rust libraries: memory safety is no substitute for input validation.

On 27 August 2026, GiveWP fixed CVE-2026-82222, a three-bug chain that turns a WordPress donation form into remote command execution with no real authentication. Administrators must upgrade to 4.16.7.2 and check for rogue accounts, even on sites where registration was disabled.

On 30 June 2026, Citrix rated CVE-2026-8452 as a memory overflow. On 14 August, WatchTowr showed it leads to pre-authentication code execution, and on 26 August CISA added it to the KEV catalog with a 29 August deadline. Appliances configured as VPN or AAA servers must be patched today, without waiting for official confirmation of exploitation.

A path-traversal flaw in VMware vCenter, rated CVSS 9.8, allows unauthenticated code execution and is already being exploited across 47 countries to drop Babuk-derived ransomware. The fix is two moves: patch without waiting for a maintenance window, and cut the management interface off from the rest of the network.

CVE-2023-49105, a WebDAV authentication flaw rated CVSS 9.8 and fixed by ownCloud in late 2023, is now being actively exploited — CISA added it to the KEV catalog on 27 August 2026. Inventory your exposed ownCloud 10.x instances, move to 10.13.1 or later, and treat them as possible compromises.

University of Toronto researchers published GPUThor, a Rowhammer attack that bypasses the ECC on NVIDIA Ampere GPUs to trigger denial of service or a root-level privilege escalation. Anyone sharing GPUs or running untrusted CUDA has to redraw their trust boundary.

On August 26, 2026, the AiLock ransomware group added Hamilton Company, a US laboratory-robotics specialist, to its leak site, threatening to publish the data unless negotiations begin. The detail that sets AiLock apart: its double extortion threatens to report the breach to regulators and share stolen data with competitors — pressure that changes the victim’s calculus.

Two authentication flaws in the miniOrange SAML 2.0 Single Sign On plugin for WordPress, exploited since mid-August 2026, let an unauthenticated visitor become an administrator. The six paid editions never received a public advisory, so no vulnerability scanner could detect them.

Between June 17 and July 22, 2026, a single operator compromised more than 14,530 Dahua cameras by chaining brute force, a 2021 flaw and the vendor’s P2P relay — 89% of them with no authentication at all. Hunt.io’s investigation reveals a hard truth: connected video surveillance is an open door by design.

CVE-2026-21962, a CVSS 10.0 access-control flaw in Oracle’s WebLogic Server proxy plug-in that was fixed in the January 2026 CPU, landed in CISA’s KEV catalog on August 24 with confirmed active exploitation. Apply the January patch before August 27 and inventory your middleware tier, which vulnerability scans too often miss.

On August 18, 2026, Mozilla fixed CVE-2026-75874, a sandbox escape in Firefox’s Remote Settings component rated CVSS 10.0 and exploitable with no interaction at all. Update Firefox and Thunderbird 154 across the fleet without waiting.

An infection chain targeting Android car head units delivers the JarService malware through DoFun’s own TWCore update app. Kaspersky attributes the operation to the MoYu group behind the BadBox botnet — the first documented malware chain built specifically for this class of device.

A deserialization flaw in Entra ID, Microsoft’s cloud identity service, allowed unauthenticated remote code execution — rated CVSS 10.0 and fixed server-side with no customer action. CISOs need to understand what "no action required" actually demands of them.

On August 20, 2026, Trend Micro disclosed fourteen functional npm packages that drop RedShell, the Linux beacon of the RedC2 4.0 C2 framework, with no install hook and no exported function call. Audit your transitive dependencies and recent package additions before a single import compromises your servers.

CVE-2026-73570, an OS command injection in Zimbra Collaboration’s SNMP component, is under active exploitation and joined CISA’s KEV catalog on August 21, 2026, with a federal due date of August 24. Patch to 10.1.20 and hunt the intruder in the logs, not just the patch.

CVE-2026-72529 (CVSS 9.8) and CVE-2026-72530 joined CISA’s KEV catalog on August 20, 2026, six weeks after a patch the Head Mare campaign already worked around. TrueConf Server operators must patch, then prove their server was not turned into a malware distribution relay.

On August 19, 2026, Cloud Software Group published a bulletin for NetScaler ADC and NetScaler Gateway: CVE-2026-19490, a CVSS 9.3 authentication bypass exploitable remotely without credentials, and CVE-2026-19489, an 8.8 denial-of-service. Any internet-facing appliance needs an emergency upgrade, after triage driven by the SAML or vserver configuration.

Two flaws in SonicWall SMA 1000 VPN gateways — a CVSS 10 SSRF and a code injection — were exploited as zero-days by INC Ransomware from July 2026. Applying the patch is necessary but not sufficient: attackers roll vulnerable firmware back to keep their foothold.

On August 18, 2026, the FBI, CISA and HHS updated their joint advisory on the Medusa ransomware: more than 500 critical infrastructure victims since 2021, up from 300 in March 2025. Defenders need to patch the exploited flaws and segment networks before the gang does it for them.

Huntress measured a 155× increase in password spraying attacks in the first half of 2026, driven by an LSHIY campaign that generated 81 million login attempts in two weeks through the ROPC flow. Security teams must disable ROPC and extend MFA to every authentication flow, with no exceptions.

Ray’s anti-browser defense was a User-Agent header check that Firefox and Safari let you forge through the fetch API. Combined with DNS rebinding, it becomes a remote code execution triggered by a single page visit — added to CISA’s KEV catalog on August 17, 2026 with a fix deadline of August 20.

CISA updated its KEV catalog to flag the Windows Task Host privilege-escalation flaw CVE-2025-60710, patched in November 2025, as now being exploited by ransomware gangs. Organizations must treat privilege-escalation patches with the same urgency as RCEs: this is the link that turns limited access into full control.

Kaspersky has found a new CoolClient backdoor variant carrying a signed kernel driver that hides processes, files, registry keys, and network connections. The HoneyMyte group (Mustang Panda) is using it against governments in Asia — detecting it requires kernel-level telemetry.

Patched by Apple on August 6, 2026, the Screen Sharing authentication bypass (CVE-2026-65400) is being actively exploited on Macs exposed on port 5900: attackers gain root and deploy Monero miners. Disable Screen Sharing or apply the update, and never expose port 5900 to the internet.

CVE-2026-73678, scored CVSS 10, lets an attacker with no account run system commands on the MindsDB platform through the Anton agent’s scratchpad tool. If you expose a MindsDB instance, cut public access before even waiting for a patch.

An Akira ransomware affiliate got initial access through a SonicWall VPN with no MFA, then rebooted the box into Safe Mode to neutralize EDR while exfiltrating. Huntress’s account shows an EDR is no safety net once an attacker holds valid credentials.

On August 13, 2026 Fortinet shipped eight fixes, including a FortiWeb authentication bypass that lets an attacker log in with random credentials and a FortiManager flaw that allows impersonating a FortiGate. Teams running a firewall fleet should treat these two as top-priority patches.

Disclosed on August 12, 2026, an unauthenticated SQL injection in GeoServer’s jsonArrayContains function can lead to remote code execution, and no patch is available yet. Attackers are already probing exposed instances: isolate yours before the fix lands.

On August 13, 2026 the rsync team released version 3.5, closing 33 CVEs including a critical flaw (CVE-2026-53791) that let a client spoof its source address through the proxy protocol. If your backups run as root over SSH, this is the update to apply first.

On August 14, 2026 Shell confirmed it is investigating a breach after Clop claimed it stole 89GB of data, including engineering drawings, through CVE-2026-12569 in PTC Windchill and FlexPLM. Exposed PLM teams need to check their instances and hunt for the JSP webshells dropped into the login directory.

On August 11, 2026 researcher Nightmare Eclipse published ShieldBreak, a proof of concept that bypasses the fix for CVE-2026-50656 (RoguePlanet), the Microsoft Defender flaw patched in July. Independent analysts have confirmed it works, and Microsoft has not yet shipped a new fix.

On August 11, 2026 Rapid7 published the technical analysis and proof of concept for CVE-2026-55040, a SharePoint authentication bypass patched back in July. By August 13 attackers were already using the PoC against honeypots — here are the four weaknesses in the JWT validation chain and what to do about them.

The August 11, 2026 Patch Tuesday ships 421 fixes — a zero-day already exploited in the wild (CVE-2026-68820) by North Korea’s Lazarus group, plus two network flaws exploitable without authentication. Here is the patch order that actually protects your estate.

An unencrypted copy of the GPG key that signs Firefox and Thunderbird Linux downloads landed in an internal Git repository by mistake. Mozilla immediately revoked the key and began a full rotation — every Linux distribution packaging the browser must rebuild against the new key.

From TanStack to Trellix via GitHub Megalodon, the five biggest supply chain attacks of 2026 prove your attack surface extends to every npm install. Third-party risk management must become continuous — the annual questionnaire is dead.

On August 8, 2026, Metabase disclosed a maximum-severity SQL injection flaw (CVSS 10.0) that was already being exploited in the wild. The vulnerability lets unauthenticated attackers gain administrator privileges and drain every connected database. Self-hosted Metabase admins must patch, revoke sessions, and rotate all secrets immediately.

On August 10, 2026, OpenAI launched GPT-5.6-Cyber, a variant of its flagship model with significantly reduced safety refusals, designed for offensive cybersecurity teams. The Daybreak program, initially a research partnership, is now an operational tool. Here is what this means for red teams and defenders.

CVE-2026-65667 is an unauthenticated privilege escalation in Microsoft Teams, rated CVSS 10.0, published August 6, 2026 outside the Patch Tuesday cycle. The advisory omits the affected component and the patched build — here's what security teams should do while they wait.

On August 6, 2026, MIT CSAIL researchers unveiled at Black Hat USA a new CPU attack that bypasses Spectre v2 fixes on both Intel and AMD processors. TONTOU exploits the gap between branch predictor neutralization and its actual use, extracting `/etc/shadow` at 5.47 bytes per second with 91.97% accuracy.

A vulnerability chain in WordPress Core, dubbed XSS2Shell, lets an unauthenticated attacker turn a single failed login attempt into full PHP remote code execution. The 7.0.3 patch landed August 6, 2026 — 43% of the web needs to apply it now.

An automated ransomware campaign dubbed RedLocker exploits passwordless Redis instances exposed to the internet. By August 4, 2026, 3,200 servers had already been compromised. Close port 6379 or enable Redis authentication now.

A new variant of the XCSSET malware compromises shared Xcode projects to infect compiled macOS applications. If you clone a repository from an infected developer, your final app ships the malware without a trace.

Forescout Vedere Labs presented 15 zero-touch provisioning vulnerabilities in TP-Link Omada at Black Hat USA, including 11 CVEs. SMBs deploying network gear via ZTP must patch immediately and rotate all exposed secrets.

On August 5, 2026, CISA added three critical vulnerabilities to its KEV catalog: CVE-2026-9198 in IBM Langflow (CVSS 9.8), CVE-2026-18576 in N-able N-central, and CVE-2026-34486 in Apache Tomcat. Federal agencies must patch immediately.

On August 3, 2026, SOCRadar documented DOUBLECUP, a Russian loader-as-a-service active since June 2026 that hides malicious code in browser‑cached PNG images. The ClickFix chain delivers CountLoader to Windows and macOS alongside a previously undocumented DeviceManager RAT steered by smart contracts.

EU Regulation 2024/2847, the Cyber Resilience Act, enters phased application starting in 2026. It requires every software vendor selling in the EU to produce a complete SBOM, fix known vulnerabilities within five business days, and notify critical incidents to ENISA within 24 hours. Here's what your organization must do before the first binding deadline.

On August 1, 2026, N-able detected active exploitation of an authentication bypass (CVE-2026-18577) in its N-central RMM platform. The fix for CVE-2026-18576 was incomplete, and attackers bypassed it in under thirty days. Here's what MSPs must do and why the RMM supply chain remains cybersecurity's weakest link.

On July 28, 2026, researcher Håkon Måløy published the first public demonstration of a document-borne AI worm capable of silently altering financial reports and self-propagating through Microsoft Copilot for Word. After 144 days of coordinated disclosure and two attempted fixes — including a model upgrade to GPT-5.6 — the vulnerability class remains exploitable.

On July 29, 2026, Cisco disclosed two zero-day vulnerabilities in Secure Firewall Management Center: static hardcoded credentials (CVE-2026-20316) and a CVSS 10.0 authentication bypass (CVE-2026-20079). Check your logs immediately — both flaws share the same indicator of compromise.

On July 14, 2026, Microsoft patched an AD CS flaw letting any authenticated user impersonate a domain controller. By July 27, the PoC was public — every unpatched domain is one script away from full compromise.

CVE-2026-16723 (CVSS 9.0) enables unauthenticated RCE on Fastjson 1.x with no patch forthcoming — ever. Enable SafeMode immediately and plan your Fastjson 2.x migration. Here is the three-step response plan.

CVE-2026-61511 enables unauthenticated PHP code execution through template rendering in vBulletin 5.x and 6.x. A public exploit exists, and the 5.x branch will receive no fix whatsoever.

Broadcom disclosed three critical VMware vulnerabilities on July 29, 2026 — a VMXNET3 VM escape and two unauthenticated RCE flaws targeting vCenter. Patch immediately: compromising vCenter gives an attacker total control over your entire virtualized infrastructure.

The first half of 2026 saw AI become an offensive weapon, zero-days consolidate into campaigns, and license wars fracture the open source stack. Here’s what every CISO and infrastructure lead needs to act on before the year ends.

99% of organizations experienced an API security incident in 2025. APIs now account for 43% of actively exploited vulnerabilities in CISA’s KEV catalog. Your API gateway is your new firewall — and you probably haven’t configured it.

Microsoft shipped its largest-ever Patch Tuesday, 24 billion stolen credentials surfaced on an exposed Elasticsearch cluster, and ransomware gangs claimed 721 new victims. Three records, one month — and none of them are a coincidence.

Mediaworks lost 8.5 TB of internal data to a ransomware group. Instructure paid ShinyHunters to keep 3.65 TB of Canvas data off the dark web. Across two weeks in May 2026, a cascade of breaches hit education, manufacturing, media, and retail — and barely anyone noticed. When breaches become background noise, the threat isn’t technical anymore. It’s apathy.

Check Point Research records 698 ransomware attacks worldwide in May 2026, a 48% year-over-year jump, even as overall attack volumes drop 7%. Fewer attacks, more impact — threat actors are getting better at doing more with less.

On March 31, 2026, Google shipped an emergency patch for CVE-2026-5281, an already-exploited use-after-free in Dawn, Chromium’s WebGPU implementation. It’s Chrome’s fourth zero-day in four months — and a clear signal that low-level graphics APIs have become the browser exploitation frontier.

On 20 January 2026, the European Commission proposed a revamped Cybersecurity Act that mandates removing high-risk foreign suppliers from the EU’s telecom networks and ICT supply chains. Operators have three years to comply, with fines reaching 7% of global turnover.

The group systematically exploited CVE-2024-50623 and CVE-2024-55956 in Cleo MFT products between October and December 2024, affecting over 180 organizations. The October patch failed; a second CVE had to be issued six weeks later.

On January 10, 2026, the BreachForums cybercrime bazaar suffered its own data breach: 324,000 user accounts with IP addresses, display names, and the forum’s official PGP key were published online. The leak is a goldmine for law enforcement and an operational catastrophe for members whose anonymity collapsed overnight.

Microsoft shipped an emergency out-of-band patch for CVE-2026-21509 on January 26, 2026. APT28 exploited it the next day against government institutions and financial-sector targets. The patch-to-exploit window just collapsed.

The SafePay ransomware group exfiltrated 8.5 terabytes of data from BPO giant Conduent between October 2024 and January 2025, exposing over 25 million individuals. It's the costliest supply chain breach of the year for US governments — and a wake-up call for any CISO who depends on a critical third party.

Attackers are deploying AI agents to automate reconnaissance, phishing, and exfiltration, compressing the breach-to-theft window to 72 minutes in the fastest observed cases. SOC teams that still rely solely on human-first triage are structurally unable to keep up.