FusionPBX up to 5.6.5 Call Recordings Download download Caller-ID name/Caller-ID number os command injection

Summaryinfo

A vulnerability marked as critical has been reported in FusionPBX up to 5.6.5. The impacted element is the function call_recordings::download of the component Call Recordings Download. This manipulation of the argument Caller-ID name/Caller-ID number causes os command injection. This vulnerability appears as CVE-2026-108161. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in FusionPBX up to 5.6.5. It has been declared as critical. Affected by this vulnerability is the function call_recordings::download of the component Call Recordings Download. The manipulation of the argument Caller-ID name/Caller-ID number with an unknown input leads to a os command injection vulnerability. The CWE definition for the vulnerability is CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

FusionPBX through 5.6.5 contains an OS command injection vulnerability in call_recordings::download() that allows unauthenticated attackers to execute commands by placing calls with malicious caller ID values. When the record_name filename template is enabled, attackers can embed shell metacharacters like $(...) in the Caller-ID name or number, executing commands as the web server user once a privileged user downloads multiple recordings as a ZIP.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-108161 since 10/09/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/10/2026). The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-96316). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

• FusionPBX

Version

• 5.6.0
• 5.6.1
• 5.6.2
• 5.6.3
• 5.6.4
• 5.6.5

License

• free

Website

• Product: https://github.com/fusionpbx/fusionpbx/

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