EXPOSURES › CVE-2026-73663
CVE-2026-73663
CRITICALUnauthenticated SQL injection in FreePBX allows remote attackers to corrupt databases and gain unauthorized remote access.
CVE-2026-73663 is a critical SQL injection flaw in FreePBX that lets unauthenticated callers inject SQL via crafted SIP headers, corrupting the database and modifying admin accounts for remote access. DIB orgs must patch FreePBX to versions 16.0.11 or 17.0.4 immediately, as this exposes VoIP infrastructure to remote compromise and violates NIST 800-171 requirements for patching known vulnerabilities.
Shame score — A critical SQL injection allowing remote access was left unpatched for multiple versions, enabling unauthenticated attackers to compromise VoIP systems without needing valid credentials.
▸ RECOMMENDED ACTION Remote code execution — patch the affected products on priority.
FreePBX is an open source IP PBX. From 16.0.0 until 16.0.11 and 17.0.4, the FreePBX missedcall module places the inbound Caller ID name from crafted SIP From headers into the missedcalllog INSERT in agi-bin/missedcallnotify.php without escaping or bound parameters. An unauthenticated caller can inject SQL when a monitored extension goes unanswered, corrupting the database and modifying FreePBX administrator accounts to obtain unauthorized remote access. This issue is fixed in versions 16.0.11 and 17.0.4.