OS Command Injection Vulnerability in Sangoma FreePBX Endpoint Manager

Historical catalog analysis: CISA added this entry on February 03, 2026. The entry reflects catalog information retrieved on August 31, 2026, not a snapshot archived on the inclusion date. Check current vendor guidance before acting.

What the vulnerability is

CVE-2025-64328 is an OS command injection vulnerability (CWE-78) identified in the Endpoint Manager component of Sangoma FreePBX. The flaw exists within the testconnection -> check_ssh_connect() function. If exploited, a known authenticated user could potentially execute arbitrary commands and obtain remote access to the system with the privileges of an ‘asterisk’ user.

Exposure and applicability

This vulnerability is particularly relevant to U.S. healthcare providers, small practices, and business associates that utilize Sangoma FreePBX for patient scheduling, clinical communications, or VoIP infrastructure. Because telephony systems often handle sensitive patient coordination and may be integrated into broader clinic networks, unauthorized remote access to the underlying system could jeopardize the confidentiality of ePHI transmitted via these channels or disrupt essential patient care operations.

It is important to note that this vulnerability requires post-authentication; it cannot be triggered by an unauthenticated external attacker. The risk is primarily associated with compromised internal accounts or malicious insiders who already possess valid credentials for the FreePBX system.

Remediation priorities

Based on our analysis, healthcare IT and security leaders should prioritize the following actions to reduce the likelihood of exploitation:

1. Apply Vendor Mitigations: The primary priority is to implement the mitigations provided by Sangoma. This addresses the root cause within the check_ssh_connect() function.
2. Review Administrative Access: Since this is a post-authentication vulnerability, security teams should audit all users with administrative or manager-level access to FreePBX. Reducing the number of accounts capable of accessing the Endpoint Manager limits the potential attack surface.
3. Network Segmentation: To limit potential damage if a system is compromised, telephony servers should be isolated from primary clinical databases and ePHI repositories. This prevents an attacker who has gained ‘asterisk’ user access from easily pivoting to more sensitive healthcare systems.

How to validate remediation

To verify that exposure has been reduced, administrators should:
* Confirm Version/Patch Status: Verify through the system dashboard or vendor-provided tools that the specific mitigations for CVE-2025-64328 have been applied.
* Audit Account Permissions: Review the user list to ensure only necessary personnel have access to the Endpoint Manager functions.

Note: A version check indicates a patch is present but does not guarantee the system is secure from other vectors or misconfigurations.

Limits and open questions

While CISA has added this vulnerability to its Known Exploited Vulnerabilities catalog, it remains unknown whether this flaw has been utilized in ransomware campaigns. Furthermore, while federal agencies have a specific deadline of February 24, 2026, for remediation, private healthcare entities should determine their own timelines based on their internal risk management processes and HIPAA Security Rule obligations.

Residual risk remains if administrative credentials are weak or shared, as the vulnerability relies on an authenticated state. The effectiveness of these measures depends on the timely application of vendor-specific updates.

Source and editorial note

CVE-2025-64328: Sangoma FreePBX OS Command Injection Vulnerability · Source date: February 03, 2026 · Retrieved August 31, 2026.

Material facts are tied to the cited primary source. Recommendations are independent defensive analysis unless attributed to the source. Confirm consequential decisions against current authoritative guidance.

Archive date: February 06, 2026. The displayed post date is assigned three days after the source date to organize this retrospective archive; it does not mean this site published the analysis then. First published by this site: September 19, 2026 at 01:29 UTC.

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