PT-2026-32963 · Fortinet · Fortiweb

Published 2026-04-14 · Updated 2026-04-15 · CVE-2026-40688

Positive Technologies (AI Summary)

CVSS v2.0

9.0

High

Base vector

AV:N/AC:L/Au:S/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions FortiWeb versions 8.0.0 through 8.0.3 FortiWeb versions 7.6.0 through 7.6.6 FortiWeb versions 7.4.0 through 7.4.11

Description An out-of-bounds write issue in the core engine may allow a remote privileged attacker to execute arbitrary code or commands via crafted HTTP requests. This flaw is associated with cat cgi paths.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

RCE

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

BDU:2026-05556

CVE-2026-40688

ZDI-26-266

Affected Products

Fortiweb

References · 9

• https://fortiguard.fortinet.com/psirt/FG-IR-26-127 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-05556 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-40688 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-26-266 · Security Note
• https://twitter.com/0dayPublishing/status/2044191383485902945 · Twitter Post
• https://twitter.com/CVEnew/status/2044338891139035586 · Twitter Post
• https://twitter.com/VulmonFeeds/status/2044231305118777429 · Twitter Post
• https://twitter.com/integ_sec/status/2044438617267830789 · Twitter Post
• https://twitter.com/TheZDIBugs/status/2044537512522068371 · Twitter Post