CVE-2026-40688 PUBLISHED

Assigner: fortinet
Reserved: 14.04.2026 Published: 14.04.2026 Updated: 15.04.2026

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.

Metrics

CVSS 3.1

CVSS 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
CVSS Score: 6.7

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	High	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	Fortinet
Product	FortiWeb
Versions	Default: unaffected affected from 8.0.0 to 8.0.3 (incl.) affected from 7.6.0 to 7.6.6 (incl.) affected from 7.4.0 to 7.4.11 (incl.)

Solutions

Upgrade to FortiWeb version 8.0.4 or above Upgrade to FortiWeb version 7.6.7 or above Upgrade to FortiWeb version 7.4.12 or above

References

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

Problem Types

Execute unauthorized code or commands CWE