Stack-based buffer overflow in Gaia - CVE-2026-91843
Published: September 16, 2026
Vulnerability identifier: #VU150235
CSH Severity: Critical
CVSS v4: 10 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H]
CVE-ID: CVE-2026-91843
CWE-ID: CWE-121
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code with root privileges.
The vulnerability exists due to a stack-based buffer overflow in the login process of Security Management and Log Servers when processing an unauthenticated login. A remote attacker can submit an excessively long username to execute arbitrary code with root privileges.
Affected software
Gaia
How to mitigate CVE-2026-91843
Install security update from vendor's website.
Gaia - update to R82.20 Take 29