Critical severity · published Aug 13, 2026
CVE-2026-73663
FreePBX: Unauthenticated SQL injection in FreePBX missedcall via inbound Caller ID name leads to administrator takeover
9.8
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 32% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MI
missedcall · FreePBX
< 16.0.11; >= 17.0.1, < 17.0.4 · source: vendor
FR
Freepbx · Sangoma
16.0 before 16.0.11; 17.0 before 17.0.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-73663
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-73663
Patch
https://github.com/FreePBX/missedcall/commit/4ada1d6b280fc246e74babc8d52f4cd1509eff24
Patch
https://github.com/FreePBX/missedcall/commit/710acdf51968db507b3f9c47ce3db006846cf44c
Mitigation
https://github.com/FreePBX/security-reporting/security/advisories/GHSA-g27h-xf3q-h3rm