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Critical CVSS 9.8

CVE-2026-71991

NVD analysis in progress

MSI Radix AXE6600 router firmware version v781521 contains a command injection vulnerability in the TelnetSSH function used for Telnet configuration that allows remote attackers to execute arbitrary commands on the affected device. Attackers can exploit this vulnerability through the Telnet configuration interface to inject malicious commands and obtain root privileges on the underlying system.

What this means

Exposure
Exploitable remotely over the network, without authentication and with no action from the victim.
Impact
An attacker can read sensitive data, modify or destroy data and take the service offline.
Weakness
Unfiltered input reaches the system shell, letting the attacker run their own commands on the server.
Likelihood
Its EPSS score puts short-term exploitation in a middle band: neither negligible nor imminent.

What to doPatch without waiting for the next scheduled cycle. Start with the instances exposed to the internet.

Read automatically from the CVSS vector, the weakness type (CWE) and the EPSS score. The technical description above remains the one published by NIST.

Published
9 August 2026
CVSS
9.8 (v3.1) CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
1.35% probability of exploitation within 30 days · above 70% of all CVEs
Weakness
CWE-78
Sources
nvd
References

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