What’s Vulnerable › Vulnerabilities
CVE-2026-45562: FreePBX: Authenticated Remote Code Execution in FreePBX Music on Hold (MoH) Module
- Severity: high (CVSS 7.2 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-09-28 · updated 2026-10-16
- Weakness: CWE-78
Description
FreePBX is an open source IP PBX. Prior to versions 16.0.4 and 17.0.6, the FreePBX Music on Hold (MoH) module contains a critical security flaw that allows authenticated attackers to execute arbitrary system commands with the privileges of the Asterisk service. Authentication with an existing FreePBX administrator account is required. The root cause lies in the fact that the module accepts a POST parameter that defines a custom Asterisk application, which is then stored in the database without any sanitization. Later, this data is written directly to the musiconhold_additional.conf configuration file without validation. Since Asterisk reads this configuration file and executes the specified application, an attacker can inject arbitrary commands that will be executed with Asterisk's permissions. This issue has been patched in versions 16.0.4 and 17.0.6.
Affected products
- Sangoma FreePBX: from 16.0 before 16.0.4; from 17.0 before 17.0.6 — fixed in 16.0.4, 17.0.6
How to fix
Upgrade to a fixed version: Sangoma FreePBX 16.0.4, 17.0.6. Check the vendor advisory for mitigations.
References
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