SB2026111133 - Out-of-bounds read in FortiOS
Published: November 11, 2026
Security Bulletin ID
SB2026111133
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Out-of-bounds read (CVE-ID: CVE-2026-126256)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: 8.3 [CVSS:4.0/AV:N/AC:L/AT:P/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 out-of-bounds read in kernel. A remote privileged attacker can execute arbitrary code or command via crafted paquets.
Remediation
Install update from vendor's website.