High severity · published Mar 5, 2026
CVE-2026-28209
FreePBX: Command Injection leading to Remote Code Execution in FreePBX ElevenLabs Text-to-Speech integration
7.2
CVSS
0.9%
EPSS
No
On KEV
Description
FreePBX is an open source IP PBX. From versions 16.0.17.2 to before 16.0.20 and from version 17.0.2.4 to before 17.0.5, a command injection vulnerability exists in FreePBX when using the ElevenLabs Text-to-Speech (TTS) engine in the recordings module. This issue has been patched in versions 16.0.20 and 17.0.5.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 61% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SE
security-reporting · FreePBX
>= 16.0.17.2, < 16.0.20; >= 17.0.2.4, < 17.0.5 · source: vendor
FR
Freepbx · Sangoma
16.0.17.2 before 16.0.20; 17.0.2.4 before 17.0.5 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-28209
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-28209
Mitigation
https://github.com/FreePBX/security-reporting/security/advisories/GHSA-f558-mp87-58vj
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