SB20261111105 - Authentication Bypass by Primary Weakness in FortiOS
Published: November 11, 2026
Security Bulletin ID
SB20261111105
CSH Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Adjecent network
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Authentication Bypass by Primary Weakness (CVE-ID: CVE-2026-126253)
CWE-ID: CWE-305 - Authentication Bypass by Primary Weakness
CVSSv4: 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]
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.
Remediation
Install update from vendor's website.