CVE-2026-40688

CVSS 6.7 MEDIUMEPSS 6.4%CWE-787

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 6.7EPSS 6.4%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

14 Apr 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

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

Affected products

Fortinet · FortiWeb

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References

https://fortiguard.fortinet.com/psirt/FG-IR-26-127