CVE-2025-64328
Published: 07 November 2025
Summary
CVE-2025-64328 is a high-severity OS Command Injection (CWE-78) vulnerability in Sangoma Firestore. Its CVSS base score is 8.6 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation of Remote Services (T1210); ranked in the top 1.1% of CVEs by exploit likelihood; CISA has added it to the Known Exploited Vulnerabilities catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).
Deeper analysis
CVE-2025-64328 is a post-authentication command injection vulnerability (CWE-78) affecting the filestore module within the Administrative interface of FreePBX Endpoint Manager, a module for managing telephony endpoints in FreePBX systems. The flaw exists in versions 17.0.2.36 and above prior to 17.0.3, specifically in the testconnection -> check_ssh_connect() function.
An authenticated user with high privileges (PR:H) can exploit this vulnerability remotely over the network (AV:N) with low attack complexity (AC:L) and no user interaction (UI:N). Successful exploitation allows the attacker to execute arbitrary commands, obtaining remote access to the system as the asterisk user and resulting in high impacts to confidentiality, integrity, and availability (C:H/I:H/A:H), with a CVSS v3.1 base score of 7.2.
The vulnerability is addressed in FreePBX Endpoint Manager version 17.0.3. Security advisories from FreePBX and GitHub's security-reporting repository provide details on the issue, including code references, and recommend upgrading to the fixed version for mitigation.
This CVE appears in the CISA Known Exploited Vulnerabilities Catalog, suggesting active real-world exploitation. Additional references include FreePBX documentation on security fixes and Fortinet threat research on a weaponized web shell.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-38232
Vulnerability details
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…
more
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.
- CWE(s)
- KEV Date Added
- 03 February 2026
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Post-authentication command injection enables exploitation of remote services (T1210) for arbitrary Unix shell command execution (T1059.004) as the asterisk user.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly mitigates the command injection vulnerability by identifying, prioritizing, and applying the vendor-released patch to FreePBX Endpoint Manager version 17.0.3.
Prevents exploitation of the command injection in check_ssh_connect() by validating and sanitizing untrusted inputs passed to system commands.
Reduces impact of successful command injection by enforcing least privilege on the asterisk user, limiting privileges available for arbitrary command execution.