Integer overflow in FortiWeb - CVE-2026-39811
Published: April 14, 2026
Vulnerability identifier: #VU125995
CSH Severity: Low
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-39811
CWE-ID: CWE-190
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote privileged user to perform a denial of service (DoS) attack.
The vulnerability exists due to integer overflow in administrative interface. A privileged authenticated attacker can perform a denial of service of the system via crafted HTTP requests.
Affected software
FortiWeb
How to mitigate CVE-2026-39811
Install update from vendor's website.
FortiWeb - addressed in versions 7.6.7, 8.0.4