Unauthenticated command execution via namespace and AMI injection
Published Aug 13, 2026 · Updated Aug 13, 2026
Command injection in FreePBX User Control Panel before 17.0.9 allows remote attackers to execute commands as the asterisk user. The UCP Node server applies Socket.IO checkAuth middleware only to the default namespace, while custom namespaces pass CR/LF-bearing event values into the Asterisk Manager Interface action path without consistent authorization. Exploitation requires network access to the UCP Node service on ports 8001 or 8003; an exposed FreePBX 17 system with no or inadequate firewall permits zero-interaction compromise.
Summary
What happened
Command injection in FreePBX User Control Panel before 17.0.9 allows remote attackers to execute commands as the asterisk user. The UCP Node server applies Socket.IO checkAuth middleware only to the default namespace, while custom namespaces pass CR/LF-bearing event values into the Asterisk Manager Interface action path without consistent authorization. Exploitation requires network access to the UCP Node service on ports 8001 or 8003; an exposed FreePBX 17 system with no or inadequate firewall permits zero-interaction compromise.
The record
- CVE
- CVE-2026-73665
- Published
- Aug 13, 2026
- Updated
- Aug 13, 2026
- Vendor
- FreePBX
- Product
- User Control Panel (UCP)
- Classifications
- CWE-862, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 13, 2026CVE publishedPublication date reported by the CVE source.
- Aug 13, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=< 17.0.9
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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