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FreePBX Music EUVDEUVD-2026-58485

| CVE-2026-73662 HIGH
OS Command Injection (CWE-78)
2026-08-13 GitHub_M
PHP Command Injection Music Red Hat
7.6
CVSS 4.0 · Vendor: GitHub_M
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Severity by source

Vendor (GitHub_M) PRIMARY
7.6 HIGH
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
6.8 MEDIUM

AC:H maps the required non-default custom player configuration (AT:P in 4.0); PR:L reflects module-level admin; S:U as impact is confined to the asterisk service account with no scope change.

3.1 AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
4.0 AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Red Hat
7.2 HIGH
qualitative

Primary rating from Vendor (GitHub_M).

CVSS VectorVendor: GitHub_M

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

4
Patch available
Aug 13, 2026 - 22:19 EUVD
Source Code Evidence Fetched
Aug 13, 2026 - 22:07 vuln.today
Analysis Generated
Aug 13, 2026 - 22:07 vuln.today
CVE Published
Aug 13, 2026 - 21:27 cve.org
HIGH 7.6

DescriptionCVE.org

FreePBX is an open source IP PBX. From 17.0.1 until 17.0.7, the FreePBX Music on Hold module permits dangerous command-line options for /usr/bin/mpg123 and other allowed players in validateCustomConfiguration() in Music.class.php. An authenticated administrator can use options that write files, open control channels, or create Asterisk call files because applicationUsesDisallowedPlayerOption() does not reject those arguments, resulting in arbitrary command execution as the asterisk service user. This issue is fixed in version 17.0.7.

AnalysisAI

Arbitrary OS command injection in FreePBX Music on Hold module versions 17.0.1 through 17.0.6 allows an authenticated administrator to execute commands as the asterisk service user by supplying dangerous player arguments through the custom application configuration interface. The validateCustomConfiguration() function in Music.class.php accepted player command-line options for mpg123, mpg321, madplay, ogg123, and cvlc without blocking file-write, FIFO, or network control flags, because the applicationUsesDisallowedPlayerOption() function lacked the blocklist logic needed to reject them. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Authenticate to FreePBX admin panel
Delivery
Navigate to Music on Hold custom player configuration
Exploit
Submit malicious player binary with dangerous argument flags
Execution
FreePBX passes unsanitized argument to asterisk service process
Persist
Write arbitrary files or open control channels as asterisk user
Impact
Leverage file-write to trigger Asterisk call file execution
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Vulnerability AssessmentAI

Exploitation Exploitation requires an authenticated session with administrative access to the FreePBX Music on Hold module specifically. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 score of 7.6 (High) reflects real but bounded risk. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker with FreePBX Music on Hold administrative access navigates to the custom application player configuration page and sets the player command to a binary such as /usr/bin/mpg123 followed by --wav /var/spool/asterisk/outgoing/attacker.call, directing mpg123 output to create an Asterisk call file in the outgoing spool directory under the asterisk service account. When FreePBX validates and applies the configuration, the player process runs with asterisk user privileges and writes the attacker-controlled file, potentially triggering unauthorized outbound calls, overwriting Asterisk configuration, or opening a named pipe for further interaction. …
Remediation Upgrade the FreePBX Music on Hold module to version 17.0.7, which introduces per-player blocklists of dangerous command-line options and enforces them in validateCustomConfiguration() before any command is executed; the update is available via the FreePBX Module Admin interface and is documented at https://github.com/FreePBX/security-reporting/security/advisories/GHSA-p97w-rq48-p8q2. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, identify all FreePBX deployments running Music on Hold module versions 17.0.1 through 17.0.6. …

Sign in for detailed remediation steps and compensating controls.

Threat intelligence, references, and detailed analysis are available after sign-in.

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EUVD-2026-58485 vulnerability details – vuln.today
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