Vulnerability · Published Apr 14, 2026 · Assigned by fortinet
CVE-2026-40688
Medium 6.7
In plain English
A medium-severity out-of-bounds write in FortiWeb from Fortinet. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 6.4% (higher than 94% of all known vulnerabilities).
Severity (CVSS 3.1)6.7Medium
Exploit odds (30 days)6.4%top 6.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
An out-of-bounds write vulnerability [CWE-787] vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.3, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4.0 through 7.4.11 may allow a remote privileged attacker to execute arbitrary code or command via crafted HTTP requests.
Affected products (as reported)
Weakness: CWE-787 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C