CVE-2025-55018
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, For
Exploited
Not listed
EPSS
0.004
28.0th percentile
Discovered by
Vendor
Vendor advisory field
Published
Feb 10, 2026
Assigned by fortinet
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
Affected products
| Vendor | Product | Category | Matched by |
|---|---|---|---|
| Fortinet | FortiOS Check your version | Firewall / NGFW | cna-assigner |
Vendor-reported products (2)
- Fortinet · FortiOS
- Siemens · RUGGEDCOM APE1808
Credit
Discovered by Daobing Li from Fortinet R&D Team
Vendor remediation
Upgrade to FortiOS version 7.6.1 or above Upgrade to FortiOS version 7.4.10 or above