On September 8, 2026, ConnectWise shipped a fix for CVE-2026-84869, a missing authorization (CVSS 9.9) that lets an attacker push and run files on a machine during an active ScreenConnect session without host confirmation. Upgrade the client to version 26.6.5, then audit past sessions and file transfers before remote access becomes the entry point into your fleet.
On September 8, 2026, Google ships Chrome 153, fixing 230 vulnerabilities including CVE-2026-87491, an out-of-bounds write in V8 already exploited in the wild. Update to 153.0.8010.36 or later before the CISA deadline of September 23, and check every Chromium browser in your fleet, Edge, Brave and Opera included.
On September 11, 2026, GitLab shipped an out-of-band release for CVE-2026-85706, a CVSS 10 path traversal that reads server files with no authentication via the commits API. The flaw is already being probed in the wild — patch self-managed instances before an attacker reads secrets.yml.
On September 10, 2026, CISA added two MikroTik RouterOS flaws — a missing authentication check and a command injection — to its KEV catalog after active exploitation. The chain yields remote code execution with no credentials, and the federal remediation deadline lands on September 13.
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 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 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.
An out-of-bounds write in the Linux kernel’s IPv6 UDP fragment handling, rated CVSS 7.8, lets a local attacker escalate privileges and is already being exploited — CISA added it to the KEV catalog on 27 August 2026. Patch the kernel before 30 August and treat IPv6 as something you monitor, not just route.
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.
CVE-2026-60004, a critical code-injection flaw in Gitea, has been exploited in the wild since August 25, 2026: an attacker can run shell commands as the forge’s system user. Self-hosted instances with open registration are hit first; the fix comes down to an upgrade and a disable switch.
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 19, 2026, CISA added CVE-2026-64849, an unauthenticated SSRF in MLflow, to its Known Exploited Vulnerabilities catalog. Any exposed MLflow tracking server should move to 3.15.0 and drop unused webhooks before the September 2, 2026 deadline.
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.
CISA added CVE-2026-33824, a remote code execution flaw in Windows IKE, to its Known Exploited Vulnerabilities catalog on August 18, 2026 — four months after Microsoft shipped the fix. Network teams must patch exposed IPsec gateways or block inbound UDP 500 and 4500 now.
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.
