CVE-2025-64328: Sangoma FreePBX High-Severity Vulnerability

What is CVE-2025-64328?

FreePBX Endpoint Manager is a module for managing telephony endpoints in FreePBX systems. In versions 17.0.2.36 and above before 17.0.3, the filestore module within the Administrative interface is vulnerable to a post-authentication command injection by an authenticated known user via the testconnection -> check_ssh_connect() function. An attacker can leverage this vulnerability to obtain remote access to the system as an asterisk user. This issue is fixed in version 17.0.3.

Technical Analysis

Weakness Classification

This vulnerability is classified as CWE-78 — OS Command Injection. The application passes untrusted input to an operating system shell command, enabling an attacker to execute arbitrary OS commands with the application's privileges.

Attack Vector Breakdown

• Attack Vector: Network
• Attack Complexity: Low
• Privileges Required: High
• User Interaction: None
• Scope: Unchanged
• Confidentiality: High
• Integrity: High
• Availability: High

Impact Analysis

This vulnerability is exploitable over the network, meaning any system reachable via the internet or internal network is potentially at risk without physical access. The attack complexity is low, meaning exploitation does not depend on specialized conditions or race windows. Successful exploitation can result in full confidentiality breach (complete data disclosure), complete integrity compromise (data modification or code execution), total availability loss (denial of service). The application passes untrusted input to an operating system shell command, enabling an attacker to execute arbitrary OS commands with the application's privileges.

Exploitation Probability (EPSS): 75.4% chance of exploitation in the next 30 days (99th percentile). This places the vulnerability in the highest risk tier — immediate action is critical.

Exploit Availability

Public exploit code or proof-of-concept is available for CVE-2025-64328. This significantly increases the risk of exploitation, as attackers can use or adapt existing exploit code rather than developing their own. A public exploit reference has been identified. Organizations should treat this as an urgent patching priority.

Is CVE-2025-64328 being exploited?

Yes. CVE-2025-64328 is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, restricted to CVEs with confirmed active exploitation in the wild. CISA added this vulnerability on 2026-02-03. Inclusion in KEV triggers the patching mandate under BOD 22-01 for U.S. federal civilian agencies, with a remediation deadline of 2026-02-24. Additionally, public exploit code is available, which lowers the barrier for attackers.

How to fix CVE-2025-64328

Apply the security update issued by Sangoma for FreePBX . If an immediate patch is not possible, consult the vendor advisory for mitigation guidance, restrict network exposure of the affected service, and monitor logs for indicators of exploitation. CISA's Known Exploited Vulnerabilities catalog requires U.S. federal agencies to remediate this vulnerability by the due date shown below under Binding Operational Directive 22-01. Private organizations should treat KEV entries as priority-one patches because active exploitation has been confirmed in the wild.

Related Vulnerabilities

Other actively exploited vulnerabilities affecting FreePBX or sharing the same weakness (CWE-78):

• CVE-2019-19006 (Critical 9.8) [same product] — Sangoma FreePBX 115.0.16.26 and below, 14.0.13.11 and below, 13.0.197.13 and…
• CVE-2025-57819 (Unknown N/A) [same product] — Sangoma FreePBX contains an authentication bypass vulnerability due to…
• CVE-2026-25108 (High 8.8) [same CWE] — FileZen contains an OS command injection vulnerability. When FileZen Antivirus…
• CVE-2026-1731 (Critical 9.8) [same CWE] — BeyondTrust Remote Support (RS) and certain older versions of Privileged…
• CVE-2025-11953 (Critical 9.8) [same CWE] — The Metro Development Server, which is opened by the React Native Community…

Frequently asked questions

Is CVE-2025-64328 critical?

CVE-2025-64328 has a CVSS 3.1 base score of 7.2 — High severity. It should be treated as a priority patch, especially given the active exploitation confirmed by CISA. The availability of public exploit code further increases the urgency.

Is CVE-2025-64328 being actively exploited?

Yes — CISA added CVE-2025-64328 to the Known Exploited Vulnerabilities catalog on 2026-02-03. Inclusion in KEV means CISA has confirmed in-the-wild exploitation. Public exploit code has also been identified, making exploitation accessible to a broader range of threat actors.

How do I patch CVE-2025-64328?

Apply the security update from Sangoma for FreePBX . Federal agencies must remediate by 2026-02-24 under BOD 22-01.

What type of vulnerability is CVE-2025-64328?

CVE-2025-64328 is classified under CWE-78 (OS Command Injection). The application passes untrusted input to an operating system shell command, enabling an attacker to execute arbitrary OS commands with the application's privileges.

What is the CVSS score for CVE-2025-64328?

CVE-2025-64328 has a CVSS 3.1 base score of 7.2, classifying it as High severity. The attack vector is Network, attack complexity is Low, and non-zero privileges are required.