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CVE-2026-40688

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 atta...

Published: Apr 14, 2026Updated: Apr 14, 2026 Sources: CVE List NVD
NVD MITRE
7.2CVSS
HIGH

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>

EPSS Score
0.4%
Top 37.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

CVSS Vector Breakdown

AV:NAC:LPR:HUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:HPrivileges Required
High
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High

Weaknesses

CWE-787

Affected Products

FortiWeb
Fortinet

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

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

Timeline

Published
Apr 14, 2026
Last Updated
Apr 14, 2026

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