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CVE-2026-86136— Fireware OS Missing Authorization in wgagent Management API Allows Denial of Service - Variant A

Quick assessment

Affected
WatchGuard Fireware OS
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.

wgagent 管理守护进程的会话初始化函数中存在一个缺失授权检查的漏洞。该漏洞允许经过认证的低权限用户（包括只读或访客管理员账户）通过提交特制的管理 API 请求，导致 wgagent 进程崩溃，并读取该守护进程有权访问的任意文件。

CVSS 7.1 · High
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I. Basic Information for CVE-2026-86136

Vulnerability Information
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Vulnerability Title
Fireware OS Missing Authorization in wgagent Management API Allows Denial of Service - Variant A
Source: CVE Program / CVE List V5
Vulnerability Description
A missing authorization vulnerability in the wgagent management daemon's session initialization function allows an authenticated, low-privileged user (including a read-only or guest administrator account) to crash the wgagent process and read arbitrary files accessible to the daemon by submitting a specially crafted management API request.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
WatchGuard Fireware OS 2026.0 ~ 2026.3.2 -
WatchGuard Fireware OS 12.0 ~ 12.5.21 -

II. Public POCs for CVE-2026-86136

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III. Intelligence Information for CVE-2026-86136

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Other References for CVE-2026-86136 (1)

Same Patch Batch · WatchGuard · 2026-09-29 · 14 CVEs total

CVE-2026-86131 9.2 CRITICAL Fireware OS Code Injection in BOVPN Over TLS Client Allows Remote Code Execution
CVE-2026-81433 8.7 HIGH Fireware OS Pre-Authentication Stack Buffer Overflow in fingerd Allows Remote Code Executi
CVE-2026-86104 8.7 HIGH Fireware OS Resource Exhaustion in Login Process Allows Denial of Service
CVE-2026-18145 8.6 HIGH Fireware OS Stack-based Buffer Overflow in spamd Allows Remote Code Execution
CVE-2026-13224 8.2 HIGH Fireware OS Path Traversal in WebUI Management Agent Allows Arbitrary Local File Read
CVE-2026-86128 8.2 HIGH Fireware OS NULL Pointer Dereference in NetFlow IPv6 Traffic Processing Allows Remote Deni
CVE-2026-86132 8.2 HIGH Fireware OS Pre-Authentication Integer Underflow in iked Allows Denial of Service
CVE-2026-86133 8.2 HIGH Fireware OS Pre-Authentication Integer Underflow in iked Allows Remote Denial of Service
CVE-2026-13046 7.5 HIGH Fireware OS Deserialization of Untrusted Data in samld Allows Remote Code Execution
CVE-2026-86101 7.2 HIGH Fireware OS Authorization Bypass in SAML Login Allows Unauthorized SSLVPN Access
CVE-2026-90441 7.1 HIGH Fireware OS Missing Authorization in wgagent Management API Allows Denial of Service - Var
CVE-2026-18105 7.1 HIGH Fireware OS Uncontrolled Resource Consumption in Diagnostic Tasks Allows Denial of Service
CVE-2026-86105 5.3 MEDIUM Fireware OS Improper Authorization in Access Portal Reverse Proxy

IV. Related Vulnerabilities

Same product: Fireware OS
Same vendor: WatchGuard
Same weakness: CWE-22

V. Comments for CVE-2026-86136

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