CVE-2025-64328
CVE-2025-64328 is a security flaw in Sangoma FreePBX. Attackers can run commands on Sangoma FreePBX. The US Cybersecurity and Infrastructure Security Agency (CISA) added it to its catalog of flaws known to be used in attacks on 3 Feb 2026.[1]
Sangoma FreePBX is business software or equipment. Most families won’t have it, but attackers break into it to get inside companies, and from there to what those companies hold about their customers, patients and staff. Sangoma has published a fix or advice.
Description
CISA calls it an OS command injection in Sangoma FreePBX. In its words: “Sangoma FreePBX Endpoint Manager contains an OS command injection vulnerability that could allow for a post-authentication command injection by an authenticated known user via the testconnection -> check_ssh_connect() function. An attacker can leverage this vulnerability to potentially obtain remote access to the system as an asterisk user.”[1]
The CVE record adds: “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.”[2]
The underlying weakness is OS command injection (CWE-78), in MITRE’s list of common software weaknesses.
It scores 7.2 out of 10 on the Common Vulnerability Scoring System, which rates it high, scored by NVD using CVSS 3.1.[2]
Affected versions
NVD’s record doesn’t list version ranges for it; Sangoma’s advisory has them[3]. CISA names the product as Sangoma FreePBX.
Most families won’t have Sangoma FreePBX; it’s for whoever looks after IT at work.
Exploitation
CISA added it to its catalog of known exploited vulnerabilities on 3 Feb 2026, 88 days after it was made public. CISA lists a flaw only when it has reliable evidence of it being exploited, and gave US federal agencies until 24 Feb 2026 to fix it.[1]
FIRST’s Exploit Prediction Scoring System, which estimates how likely a flaw is to be used in attacks in the next 30 days from what it sees across the internet, puts it at 85%. That’s in the top 1% of the flaws it scores.[4]
CISA assesses it as not automatable: each attack takes some work.
CISA doesn’t say who was attacked, or how.
Fix
Sangoma has published a fix or advice.[3] CISA’s required action: “Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.”[1]
- Check whether you use it.Sangoma FreePBX is business software or equipment, so most families won’t have it. If you run a business, or work from home on company equipment, ask whoever looks after your IT.
- Send this page to your IT person.Ask them to confirm it’s fixed, or not in use. CISA gave US government agencies until 24 Feb 2026 to fix it.
- If it can’t be fixed, take it offline.CISA’s advice when there’s no fix is to stop using the product, or take it off the internet, until there is one.
You can’t fix someone else’s server, but you can watch for what follows a break-in like this: a breach notice, a password reset you didn’t ask for, or a scam message that knows things it shouldn’t. HARD watches for those for you and your family.
Timeline
| Date | Event |
|---|---|
| The flaw is made public in the National Vulnerability Database, with a severity score of 7.2.[2] | |
| CISA adds it to its catalog of flaws known to be used in attacks.[1] | |
| CISA’s deadline for US government agencies to fix it.[1] | |
| FIRST puts the odds of it being used in attacks in the next 30 days at 85%.[4] |
See also
Other Sangoma FreePBX flaws
- CVE-2019-19006: improper authentication ·
- CVE-2025-57819: authentication bypass ·
Other Sangoma flaws
- CVE-2026-9586, Sangoma Switchvox: SQL injection ·
Other OS command injection flaws
- CVE-2026-110447, Collabora Online – Built-in CODE Server: online – built-in CODE server OS command injection ·
- CVE-2026-106931, EG Secure Solutions SiteGuard Server Edition: OS command injection ·
- CVE-2026-83549, SonicWall SMA1000 Appliances: OS command injection ·
- CVE-2026-49869, Kestra OSS: OSS OS command injection ·
- CVE-2026-73570, Synacor Zimbra Collaboration Suite (ZCS): OS command injection ·
Added the same day
- CVE-2025-40551, SolarWinds Web Help Desk: deserialization of untrusted data ·
- CVE-2021-39935, GitLab Community and Enterprise Editions: server-side request forgery (SSRF) ·
- CVE-2019-19006, Sangoma FreePBX: improper authentication ·
Every Sangoma flaw on CISA’s list · Everything added in February 2026
References
- ^ Cybersecurity and Infrastructure Security Agency. “Sangoma FreePBX OS Command Injection Vulnerability”. Known Exploited Vulnerabilities Catalog, added 3 Feb 2026.
- ^ National Institute of Standards and Technology. “CVE-2025-64328 Detail”. National Vulnerability Database, published 7 Nov 2025.
- ^ Sangoma. Advisories and fixes: github.com, freepbx.org.
- ^ FIRST. “Exploit Prediction Scoring System”. EPSS 0.846, percentile 99.7, 31 Oct 2026.
- CVE Program. “CVE-2025-64328”. The official CVE record.
This article is built from CISA’s catalog (version 2026.10.30), NVD’s record and FIRST’s scores, kept in HARD’s database and checked every morning. The plain English is HARD’s.