Out-of-bounds write in FortiWeb - CVE-2026-40688
Published: April 15, 2026
Vulnerability identifier: #VU126107
CSH Severity: Low
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-40688
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote privileged user to execute arbitrary code.
The vulnerability exists due to out-of-bounds write in administrative interface. A remote privileged attacker can execute arbitrary code or command via crafted HTTP requests.
Affected software
FortiWeb
How to mitigate CVE-2026-40688
Install update from vendor's website.
FortiWeb - addressed in versions 7.4.12, 7.6.7, 8.0.4