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CVE-2026-54674— Authenticated Command Injection in FreePBX UCP Interface

Quick assessment

Affected
FreePBX security-reporting
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.

FreePBX 是一款开源的 IP PBX 系统。在版本 16.0.39 和 17.0.7 之前，通过用户控制面板（UCP）进行身份验证的用户，可以利用特制的 HTTP 字符串，以 Web 服务器用户（通常是 asterisk）的身份在 PBX 上执行任意命令。访问 UCP 需要进行身份验证。值得注意的是，相较于管理员控制面板（ACP）通常仅限 FreePBX 高级管理员账户使用，UCP 的访问权限更常被赋予权限较低的用户。UCP 使用的某些 URL 参数存在 sanitization（净化/过滤）不足的问题，未能

CVSS 8.6 · High

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProduct Version RangeStatus
FreePBX security-reporting < 16.0.39 affected
< 17.0.7 affected
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I. Basic Information for CVE-2026-54674

Vulnerability Information
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Vulnerability Title
Authenticated Command Injection in FreePBX UCP Interface
Source: CVE Program / CVE List V5
Vulnerability Description
FreePBX is an open source IP PBX. Prior to versions 16.0.39 and 17.0.7, users authenticated via User Control Panel (UCP) are able to execute arbitrary commands on the PBX as the webserver user (typically asterisk) using specially crafted HTTP strings. Authenticated access to UCP is required. Note that this is often more common for less-privileged users to have UCP access vs. the Administrator Control Panel (ACP) access (which is usually FreePBX higher-level administrator accounts only). Insufficient sanitization of certain URL parameters utilized by UCP did not fully account for malicious strings in these fields. This could result in binaries being executed on the host server by carefully chaining commands. This issue has been patched in versions 16.0.39 and 17.0.7.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
FreePBX security-reporting < 16.0.39 -

II. Public POCs for CVE-2026-54674

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III. Intelligence Information for CVE-2026-54674

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Other References for CVE-2026-54674 (1)

Same Patch Batch · FreePBX · 2026-09-28 · 6 CVEs total

CVE-2026-54675 8.7 HIGH FreePBX: Authenticated Remote Code Execution via File Upload and Convert in Soundlang Modu
CVE-2026-75600 8.6 HIGH FreePBX: Authenticated API generatedocs Host Command Injection
CVE-2026-54710 8.6 HIGH FreePBX: Authenticated Superfecta Arbitrary PHP Code Execution (RCE via Unsafe File Inclus
CVE-2026-54708 8.6 HIGH Authenticated Remote Code Execution via Path Traversal in FreePBX Backup Module
CVE-2026-45562 7.7 HIGH FreePBX: Authenticated Remote Code Execution in FreePBX Music on Hold (MoH) Module

IV. Related Vulnerabilities

Same product: security-reporting
Same vendor: FreePBX
Same weakness: CWE-78

V. Comments for CVE-2026-54674

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