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CVE-2025-55018

Quick assessment

Affected
Fortinet FortiOS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Fortinet FortiOS是美国飞塔（Fortinet）公司的一套专用于FortiGate网络安全平台上的安全操作系统。该系统为用户提供防火墙、防病毒、IPSec/SSLVPN、Web内容过滤和反垃圾邮件等多种安全功能。 Fortinet FortiOS 7.6.0版本、7.4.0版本至7.4.9版本、7.2所有版本、7.0所有版本和6.4.3版本至6.4.16版本存在环境问题漏洞，该漏洞源于HTTP请求解释不一致，可能导致通过特制标头走私未记录的HTTP请求。

CVSS 5.2 · Medium EPSS 0.40% · P32

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 5

VendorProduct Version RangeStatus
Fortinet FortiOS 7.6.0 affected
7.4.0≤ 7.4.9 affected
7.2.0≤ 7.2.13 affected
7.0.0≤ 7.0.19 affected
6.4.3≤ 6.4.16 affected
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I. Basic Information for CVE-2025-55018

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
HTTP请求的解释不一致性(HTTP请求私运)
Source: CVE Program / CVE List V5
Vulnerability Title
Fortinet FortiOS 环境问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Fortinet FortiOS是美国飞塔（Fortinet）公司的一套专用于FortiGate网络安全平台上的安全操作系统。该系统为用户提供防火墙、防病毒、IPSec/SSLVPN、Web内容过滤和反垃圾邮件等多种安全功能。 Fortinet FortiOS 7.6.0版本、7.4.0版本至7.4.9版本、7.2所有版本、7.0所有版本和6.4.3版本至6.4.16版本存在环境问题漏洞，该漏洞源于HTTP请求解释不一致，可能导致通过特制标头走私未记录的HTTP请求。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Fortinet FortiOS 7.6.0 cpe:2.3:o:fortinet:fortios:7.6.0:*:*:*:*:*:*:*

II. Public POCs for CVE-2025-55018

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III. Intelligence Information for CVE-2025-55018

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Same Patch Batch · Fortinet · 2026-02-10 · 8 CVEs total

CVE-2025-52436 7.9 HIGH Fortinet FortiSandbox 跨站脚本漏洞
CVE-2026-22153 7.5 HIGH Fortinet FortiOS 安全漏洞
CVE-2026-21743 6.8 MEDIUM Fortinet FortiAuthenticator 安全漏洞
CVE-2025-64157 6.7 MEDIUM Fortinet FortiOS 格式化字符串错误漏洞
CVE-2025-62676 6.4 MEDIUM Fortinet FortiClientWindows 后置链接漏洞
CVE-2025-68686 5.3 MEDIUM Fortinet FortiOS 信息泄露漏洞
CVE-2025-62439 3.8 LOW Fortinet FortiOS 安全漏洞

IV. Related Vulnerabilities

Same product: FortiOS
Same vendor: Fortinet
Same weakness: CWE-444

V. Comments for CVE-2025-55018

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