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CVE-2026-73664— FreePBX: Authenticated Arbitrary SSH Key Injection via Backup Module

Quick assessment

Affected
FreePBX backup
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 17.0.5.34版本至17.0.11之前版本存在权限许可和访问控制问题漏洞，该漏洞源于Backup.class.php中的publicKeySave AJAX端点未可靠执行备份专用命令和来源限制，经过身份验证的管理员可将SSH公钥添加至authorized_keys文件，从而获取持久shell访问权限，执行任意命令、访问FreePBX和通话数据、修改系统文件以及中断服务。

CVSS 8.6 · High EPSS 0.51% · P41

Affected Version Matrix 1

VendorProduct Version RangeStatus
FreePBX backup >= 17.0.5.34, < 17.0.11 affected
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I. Basic Information for CVE-2026-73664

Vulnerability Information
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Vulnerability Title
FreePBX: Authenticated Arbitrary SSH Key Injection via Backup Module
Source: CVE Program / CVE List V5
Vulnerability Description
FreePBX is an open source IP PBX. From 17.0.5.34 until 17.0.11, the publicKeySave AJAX endpoint in Backup.class.php accepts an authenticated administrator's SSH public key and appends it to /home/asterisk/.ssh/authorized_keys for the asterisk system user without reliably enforcing backup-only command and source restrictions. The key grants persistent shell access that can execute arbitrary commands, access FreePBX and call data, modify system files, and disrupt services. This issue is fixed in version 17.0.11.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
特权管理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
FreePBX 权限许可和访问控制问题漏洞
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 17.0.5.34版本至17.0.11之前版本存在权限许可和访问控制问题漏洞，该漏洞源于Backup.class.php中的publicKeySave AJAX端点未可靠执行备份专用命令和来源限制，经过身份验证的管理员可将SSH公钥添加至authorized_keys文件，从而获取持久shell访问权限，执行任意命令、访问FreePBX和通话数据、修改系统文件以及中断服务。
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 backup >= 17.0.5.34, < 17.0.11 -

II. Public POCs for CVE-2026-73664

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 8134 chars
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III. Intelligence Information for CVE-2026-73664

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Vendor Advisories for CVE-2026-73664 (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-2026-73662 7.6 HIGH Authenticated FreePBX Music RCE via mpg123 and Asterisk Call Files
CVE-2026-73660 7.5 HIGH FreePBX: Authenticated TTS AGI Command Injection Through TTS Name

IV. Related Vulnerabilities

Same product: backup
Same vendor: FreePBX
Same weakness: CWE-269

V. Comments for CVE-2026-73664

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