CVE-2026-40688 — Out-of-bounds Write in Fortinet Fortiweb

CWE-787 — Out-of-bounds Write4 documents4 sources
Severity
7.2HIGHNVD
EPSS
0.4%
top 37.42%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Fortinet Fortiweb
Timeline
PublishedApr 14
Latest updateApr 15

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

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:HExploitability: 1.2 | Impact: 5.9

Affected Packages1 packages

▶CVEListV5fortinet/fortiweb8.0.0 — 8.0.3+2

🔴Vulnerability Details

2
GHSA
GHSA-m3qh-6w2c-jgrx: A out-of-bounds write vulnerability in Fortinet FortiWeb 8↗2026-04-15
▶
CVEList
CVE-2026-40688: An out-of-bounds write vulnerability [CWE-787] vulnerability in Fortinet FortiWeb 8↗2026-04-14
▶

📋Vendor Advisories

1
Fortinet
Out-Of-Bounds Write in administrative interface↗2026-04-14
▶
CVE-2026-40688 — Out-of-bounds Write in Fortinet | cvebase