CVE-2025-55018 Other in FortiOS

What is CVE-2025-55018?

CVE-2025-55018 is a medium-severity vulnerability in Fortinet Fortios, published on 10 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An inconsistent interpretation of http requests ('http request smuggling') vulnerability in Fortinet FortiOS 7.6.0, FortiOS 7.4.0 through 7.4.9, FortiOS 7.2 all versions, FortiOS 7.0 all versions, FortiOS 6.4.3 through 6.4.16 may allow an unauthenticated attacker to smuggle an unlogged http request through the firewall policies via a specially crafted header

Weakness: CWE-444

Which versions are affected by CVE-2025-55018?

It affects 1 product.

Products include Fortinet Fortios.

How do I fix CVE-2025-55018?

No fix has been published for CVE-2025-55018 yet. Limit exposure of the affected software until one is available.

Is CVE-2025-55018 being exploited?

There is no known exploitation of CVE-2025-55018 in the wild and no public exploit code.

Other vulnerabilities in Fortinet Fortios

• CVE-2024-23113 Fortinet Multiple Products Format String Exploited Critical 9.8
• CVE-2022-40684 Fortinet Multiple Products Authentication Bypass Exploited Critical 9.8
• CVE-2024-55591 Fortinet FortiOS and FortiProxy Authentication Bypass Exploited Critical 9.6
• CVE-2024-21762 Fortinet FortiOS Out-of-Bound Write Exploited Critical 9.6
• CVE-2022-42475 Fortinet FortiOS Heap-Based Buffer Overflow Exploited Critical 9.3

All Fortinet Fortios vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-7hxv-xg9w-4xg7.