SB2026111127 - Out-of-bounds write in FortiAuthenticator
Published: November 11, 2026
Security Bulletin ID
SB2026111127
CSH Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Out-of-bounds write (CVE-ID: CVE-2026-126245)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: 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]
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.
Remediation
Install update from vendor's website.