What’s Vulnerable › Vulnerabilities

CVE-2026-73663: FreePBX: Unauthenticated SQL injection in FreePBX missedcall via inbound Caller ID name leads to administrator takeover

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-13 · updated 2026-10-09
• Weakness: CWE-89

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.

Affected products

• Sangoma FreePBX: from 16.0 before 16.0.11; from 17.0 before 17.0.4 — fixed in 16.0.11, 17.0.4

How to fix

Upgrade to a fixed version: Sangoma FreePBX 16.0.11, 17.0.4. Check the vendor advisory for mitigations.

References

• https://github.com/FreePBX/missedcall/commit/4ada1d6b280fc246e74babc8d52f4cd1509eff24
• https://github.com/FreePBX/missedcall/commit/710acdf51968db507b3f9c47ce3db006846cf44c
• https://github.com/FreePBX/security-reporting/security/advisories/GHSA-g27h-xf3q-h3rm

Get alerted when CVE-2026-73663 or the next vulnerability affects your stack