Authentication Bypass by Primary Weakness in FortiOS - CVE-2026-126253
Published: November 11, 2026
Vulnerability identifier: #VU165282
CSH Severity: High
CVSS v4: 7.2 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-126253
CWE-ID: CWE-305
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to damange or delete data.
The vulnerability exists due to authentication bypass by primary weakness. A remote non-authenticated attacker can exploit this vulnerability to damange or delete data.
Affected software
FortiOS
How to mitigate CVE-2026-126253
Install update from vendor's website.
FortiOS - addressed in versions 7.2.14, 7.4.13, 7.6.8, 8.0.2