CVE-2026-28209Network attack vector

Authenticated shell command execution via unsanitized filename

Published Mar 5, 2026 · Updated Mar 5, 2026

Command injection in affected FreePBX recordings modules allows remote authenticated users to execute shell commands on the PBX host. In Elevenlabs.php, convertToAudio() concatenates the user-controlled recording filename into an ffmpeg command string and passes it to exec() without shell escaping. Exploitation requires a known username, access to recordings functionality, and a configured ElevenLabs API key; commands run as the asterisk user.

CVSS severity7.5
High
EPSS probability0.89%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in affected FreePBX recordings modules allows remote authenticated users to execute shell commands on the PBX host. In Elevenlabs.php, convertToAudio() concatenates the user-controlled recording filename into an ffmpeg command string and passes it to exec() without shell escaping. Exploitation requires a known username, access to recordings functionality, and a configured ElevenLabs API key; commands run as the asterisk user.

The record

CVE
CVE-2026-28209
Published
Mar 5, 2026
Updated
Mar 5, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-78, T1059.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.004Unix Shell

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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