Out-Of-Bounds Write in administrative interface

Summary

An out-of-bounds write vulnerability [CWE-787] in FortiWeb CGI daemon may allow a remote privileged attacker to execute arbitrary code or command via crafted HTTP requests.

Version Affected Solution
FortiWeb 8.0 8.0.0 through 8.0.3 Upgrade to 8.0.4 or above
FortiWeb 7.6 7.6.0 through 7.6.6 Upgrade to 7.6.7 or above
FortiWeb 7.4 7.4.0 through 7.4.11 Upgrade to 7.4.12 or above
FortiWeb 7.2 Not affected Not Applicable
FortiWeb 7.0 Not affected Not Applicable

Acknowledgement

Fortinet is pleased to thank Jason McFadyen of TrendAI Research for reporting this vulnerability under responsible disclosure.

Timeline

2026-04-15: Initial publication