CVE-2026-28287Network attack vector

Authenticated shell command execution via crafted filenames

Published Mar 5, 2026 · Updated Mar 5, 2026

Command injection in the FreePBX recordings module allows remote authenticated users to execute shell commands through crafted filenames. Authenticated AJAX endpoints pass insufficiently sanitized file and filenames[] POST values into shell-executed Media subsystem operations. Access to the Administration panel with a known username is required in versions 16.0.17.2 to before 16.0.20 and 17.0.2.4 to before 17.0.5; injected commands run as asterisk.

CVSS severity8.6
High
EPSS probability8.03%
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 the FreePBX recordings module allows remote authenticated users to execute shell commands through crafted filenames. Authenticated AJAX endpoints pass insufficiently sanitized file and filenames[] POST values into shell-executed Media subsystem operations. Access to the Administration panel with a known username is required in versions 16.0.17.2 to before 16.0.20 and 17.0.2.4 to before 17.0.5; injected commands run as asterisk.

The record

CVE
CVE-2026-28287
Published
Mar 5, 2026
Updated
Mar 5, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-78, T1059.004
Attack vector
network
Privileges
admin

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 privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.6GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
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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