SB2026111132 - Numeric Truncation Error in FortiOS
Published: November 11, 2026
Security Bulletin ID
SB2026111132
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) Numeric Truncation Error (CVE-ID: CVE-2026-126254)
CWE-ID: CWE-197 - Numeric Truncation Error
CVSSv4: 7.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote authenticated user to damange or delete data.
The vulnerability exists due to numeric truncation error. A configured ibgp neighbor can send malicious/malformed attributes to all connected routers via a specially crafted request.
Remediation
Install update from vendor's website.