CVE-2024-54021: Fortinet FortiOS

Medium severity, CVSS 5.8. EPSS: 0.8% chance of exploitation in the next 30 days.

An Improper Neutralization of CRLF Sequences in HTTP Headers ('http response splitting') vulnerability [CWE-113] in Fortinet FortiOS 7.2.0 through 7.6.0, FortiProxy 7.2.0 through 7.4.5 may allow a remote unauthenticated attacker to bypass the file filter via crafted HTTP headers.

Affected products

• Fortinet FortiOS: from 7.2.0, before 7.2.9 (fixed in 7.2.9); from 7.4.0, before 7.4.5 (fixed in 7.4.5); version 7.6.0 only
• Fortinet FortiProxy: from 7.2.0, before 7.2.12 (fixed in 7.2.12); from 7.4.0, before 7.4.6 (fixed in 7.4.6)

Published 2025-01-14. Last modified 2026-06-17.