FortiWeb
CVE-2026-39811: Integer overflow or wraparound in FortiWeb
A integer overflow or wraparound vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.3, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4 all versions, FortiWeb 7.2 all versions, FortiWeb 7.0 all versions may allow attacker to denial of service via <insert attack vector here>
Published
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| FortiWeb 8.0.0 to 8.0.3 | 8.0.4 or later |
| FortiWeb 7.6.0 to 7.6.6 | 7.6.7 or later |
| FortiWeb 7.4.0 to 7.4.12 | Upgrade past 7.4.12; see the advisory |
| FortiWeb 7.2.0 to 7.2.12 | Upgrade past 7.2.12; see the advisory |
| FortiWeb 7.0.0 to 7.0.12 | Upgrade past 7.0.12; see the advisory |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
A integer overflow or wraparound vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.3, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4 all versions, FortiWeb 7.2 all versions, FortiWeb 7.0 all versions may allow attacker to denial of service via <insert attack vector here>
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 10 Oct 2026.