CVE-2023-42789: Fortinet FortiOS

Critical severity, CVSS 9.8. EPSS: 3.3% chance of exploitation in the next 30 days.

A out-of-bounds write vulnerability in Fortinet FortiOS 7.4.0 through 7.4.1, FortiOS 7.2.0 through 7.2.5, FortiOS 7.0.0 through 7.0.12, FortiOS 6.4.0 through 6.4.14, FortiOS 6.2.0 through 6.2.15, FortiProxy 7.4.0, FortiProxy 7.2.0 through 7.2.6, FortiProxy 7.0.0 through 7.0.12, FortiProxy 2.0.0 through 2.0.13, FortiSASE 23.2.b allows attacker to execute unauthorized code or commands via specially crafted HTTP requests.

Affected products

• Fortinet FortiOS: from 6.2.0, up to and including 6.2.15; from 6.4.0, up to and including 6.4.14; from 7.0.0, up to and including 7.0.12; from 7.2.0, up to and including 7.2.5; version 7.4.0 only; version 7.4.1 only
• Fortinet FortiProxy: from 2.0.0, up to and including 2.0.13; from 7.0.0, up to and including 7.0.12; from 7.2.0, up to and including 7.2.6; version 7.4.0 only

Published 2024-03-12. Last modified 2026-07-08.