CVE-2026-40688

Published Apr 14, 2026 CVSS 3.1 · 6.7 Medium EPSS 6.7% KEV · Not listed
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.

Remediation

Vendor Solution

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

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Title Remote Code Execution via Out-of-Bounds Write in FortiWeb
Type Values Removed Values Added
Title Remote Code Execution via Out-of-Bounds Write in FortiWeb
Type Values Removed Values Added
Title Out‑of‑Bounds Write Allowing Remote Code Execution in Fortinet FortiWeb
Type Values Removed Values Added
CPEs cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:*
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Title Out‑of‑Bounds Write Allowing Remote Code Execution in Fortinet FortiWeb
Type Values Removed Values Added
Description A out-of-bounds write 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 attacker to execute unauthorized code or commands via <insert attack vector here> 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.
Type Values Removed Values Added
Description A out-of-bounds write 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 attacker to execute unauthorized code or commands via <insert attack vector here>
First Time appeared Fortinet
Fortinet fortiweb
Weaknesses CWE-787
CPEs cpe:2.3:a:fortinet:fortiweb:7.4.0:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiweb:7.4.10:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiweb:7.4.11:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiweb:7.4.1:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiweb:7.4.2:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiweb:7.4.3:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiweb:7.4.4:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiweb:7.4.5:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiweb:7.4.6:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiweb:7.4.7:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiweb:7.4.8:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiweb:7.4.9:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiweb:7.6.0:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiweb:7.6.1:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiweb:7.6.2:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiweb:7.6.3:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiweb:7.6.4:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiweb:7.6.5:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiweb:7.6.6:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiweb:8.0.0:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiweb:8.0.1:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiweb:8.0.2:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiweb:8.0.3:*:*:*:*:*:*:*
Vendors & Products Fortinet
Fortinet fortiweb
References
Metrics cvssV3_1

{'score': 6.7, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
fortinet
Published
Updated
Apr 16, 2026, 3:55 AM
Reserved
Apr 14, 2026, 10:32 PM
Status
Analyzed
Published
Apr 14, 2026, 11:16 PM
Modified
Jul 24, 2026, 9:10 PM