Out-of-bounds write in FortiAuthenticator - CVE-2026-126245
Published: November 11, 2026
Vulnerability identifier: #VU165156
CSH Severity: High
CVSS v4: 9.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-126245
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.
The vulnerability exists due to out-of-bounds write. An unauthenticated attacker can execute unauthorized code or commands via http requests, should the attacker be able to defeat ASLR protections.
Affected software
FortiAuthenticator
How to mitigate CVE-2026-126245
Install update from vendor's website.
FortiAuthenticator - addressed in versions 6.6.11, 8.0.4