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CVE-2026-73660— FreePBX: Authenticated TTS AGI Command Injection Through TTS Name

Quick assessment

Affected
FreePBX tts
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FreePBX是FreePBX团队开源的一款基于Web的电话交换系统。 FreePBX 16.0.6之前版本和17.0.5.4之前版本存在命令注入漏洞，该漏洞源于Text-To-Speech模块对TTS目标名称处理不当，该名称经HTML编码存储、解码后作为AGI参数传递并用于构建文件名，可能允许经过身份验证的管理员以asterisk服务用户身份执行任意操作系统命令。

CVSS 7.5 · High EPSS 0.77% · P54

Affected Version Matrix 2

VendorProduct Version RangeStatus
FreePBX tts < 16.0.6 affected
>= 17.0.1, < 17.0.5.4 affected
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I. Basic Information for CVE-2026-73660

Vulnerability Information
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Vulnerability Title
FreePBX: Authenticated TTS AGI Command Injection Through TTS Name
Source: CVE Program / CVE List V5
Vulnerability Description
FreePBX is an open source IP PBX. Prior to 16.0.6 and 17.0.5.4, the FreePBX Text-To-Speech module allows an authenticated administrator to save a TTS destination name that is HTML-encoded for storage, decoded during dialplan generation, passed as an AGI argument, and used to build filenames inside agi-bin/propolys-tts.agi. The TTS destination name reaches a raw shell-command execution path, allowing arbitrary operating-system command execution as the asterisk service user. This issue is fixed in versions 16.0.6 and 17.0.5.4.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/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
Vulnerability Title
FreePBX 命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FreePBX是FreePBX团队开源的一款基于Web的电话交换系统。 FreePBX 16.0.6之前版本和17.0.5.4之前版本存在命令注入漏洞，该漏洞源于Text-To-Speech模块对TTS目标名称处理不当，该名称经HTML编码存储、解码后作为AGI参数传递并用于构建文件名，可能允许经过身份验证的管理员以asterisk服务用户身份执行任意操作系统命令。
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
FreePBX tts < 16.0.6 -

II. Public POCs for CVE-2026-73660

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Reproduced successfully in a real sandbox · Below is the actual recording of building the environment and exploiting the vulnerability.
Success marker: VULNERABLE: TTS AGI command injection - uid=0(root), injected \$( ) executed, flag PROOF_70bafb44b0e1068f present in container
Reproduction recording is a Pro+ exclusive
Watch the full sandbox build + live exploit recording for this CVE. Limited-time ¥499/mo.
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claude_code · 7887 chars
GitHub 复现环境（可 clone 直接跑）
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III. Intelligence Information for CVE-2026-73660

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Patches & Fixes for CVE-2026-73660 (2)

Vendor Advisories for CVE-2026-73660 (1)

Same Patch Batch · FreePBX · 2026-08-13 · 6 CVEs total

CVE-2026-73663 9.3 CRITICAL FreePBX: Unauthenticated SQL injection in FreePBX missedcall via inbound Caller ID name le
CVE-2026-73665 9.3 CRITICAL FreePBX UCP: Unauthenticated remote code execution via socket.io namespace auth bypass and
CVE-2026-73661 8.6 HIGH FreePBX: Authenticated Framework AUTHTYPE Can Be Restored From a Crafted Backup
CVE-2026-73664 8.6 HIGH FreePBX: Authenticated Arbitrary SSH Key Injection via Backup Module
CVE-2026-73662 7.6 HIGH Authenticated FreePBX Music RCE via mpg123 and Asterisk Call Files

IV. Related Vulnerabilities

Same product: tts
Same vendor: FreePBX
Same weakness: CWE-78

V. Comments for CVE-2026-73660

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