PSIRTInteger Overflow Denial of Service in administrative interface
Summary
An Integer Overflow or Wraparound vulnerability [CWE-190] in FortiWeb may allow a privileged authenticated attacker to perform a denial of service of the system 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 all versions | Migrate to a fixed release |
| FortiWeb 7.2 | 7.2 all versions | Migrate to a fixed release |
| FortiWeb 7.0 | 7.0 all versions | Migrate to a fixed release |
Acknowledgement
Fortinet is pleased to thank Jason McFadyen of TrendAI Research for reporting this vulnerability under responsible disclosure.Timeline
2026-04-14: Initial publication