SB2026021046 - Format String error in FortiOS CAPWAP fast-failover mode
Published: February 10, 2026
Security Bulletin ID
SB2026021046
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Format string error (CVE-ID: CVE-2025-64157)
CWE-ID: CWE-134 - Use of Externally-Controlled Format String
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote user to execute arbitrary code on the target system.
The vulnerability exists due to a format string error in CAPWAP fast-failover mode. A remote privileged user can supply a specially crafted configuration via CLI and execute arbitrary code on the target system.
Remediation
Install update from vendor's website.