CVE-2026-40688
Received Received - Intake
Out-of-Bounds Write in Fortinet FortiWeb Enables Code Execution

Publication date: 2026-04-14

Last updated on: 2026-04-20

Assigner: Fortinet, Inc.

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.
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Meta Information
Published
2026-04-14
Last Modified
2026-04-20
Generated
2026-06-16
AI Q&A
2026-04-15
EPSS Evaluated
2026-06-15
NVD
CVE-2026-40688
EUVD
EUVD-2026-22808
Affected Vendors & Products
Showing 3 associated CPEs
Vendor Product Version / Range
fortinet fortiweb From 7.6.0 (inc) to 7.6.7 (exc)
fortinet fortiweb From 8.0.0 (inc) to 8.0.4 (exc)
fortinet fortiweb From 7.4.0 (inc) to 7.4.12 (exc)
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-787 The product writes data past the end, or before the beginning, of the intended buffer.
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Executive Summary

This vulnerability is an out-of-bounds write issue found in Fortinet FortiWeb versions 7.4.0 through 7.4.11, 7.6.0 through 7.6.6, and 8.0.0 through 8.0.3. It may allow an attacker to execute unauthorized code or commands on the affected system.

Impact Analysis

The vulnerability can lead to unauthorized code or command execution, which may compromise the confidentiality, integrity, and availability of the affected system.

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