CVE-2026-73663 FreePBX: Unauthenticated SQL injection in FreePBX missedcall via inbound Caller ID name leads to administrator takeover
Unauthenticated attackers can inject SQL via Caller ID names to modify administrator accounts and gain unauthorized remote access to FreePBX systems.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-73663?
CVE-2026-73663 is a critical SQL injection vulnerability in Sangoma Freepbx, published on 13 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-89
Which versions are affected by CVE-2026-73663?
It affects 1 product.
Products include Sangoma Freepbx.
How do I fix CVE-2026-73663?
No fix has been published for CVE-2026-73663 yet. Limit exposure of the affected software until one is available.
Use parameterised queries everywhere and never build SQL by joining strings. Upgrade affected software first; a web application firewall only buys time. More about SQL injection.
Is CVE-2026-73663 being exploited?
There is no known exploitation of CVE-2026-73663 in the wild and no public exploit code.
Other vulnerabilities in Sangoma Freepbx
- CVE-2025-57819 Sangoma FreePBX Authentication Bypass
- CVE-2019-19006 Sangoma FreePBX Improper Authentication
- CVE-2026-73665 FreePBX UCP: Unauthenticated remote code execution via socket.io namespace auth bypass and AMI action injection
- CVE-2026-46376 FreePBX: Unauthenticated Use of Hard-Coded Credentials Vulnerability in FreePBX UCP Interface
- CVE-2025-66039 FreePBX Endpoint Manager Allows Unauthenticated Logins to Administrator Control Panel via Forged Basic Auth Header
Sources
Also known as GHSA-g27h-xf3q-h3rm.