High severity · published Sep 28, 2026
CVE-2026-54708
Authenticated Remote Code Execution via Path Traversal in FreePBX Backup Module
8.8
CVSS
0.5%
EPSS
No
On KEV
Description
FreePBX is an open source IP PBX. Prior to versions 16.0.72 and 17.0.7, a critical vulnerability exists in the FreePBX backup Module that allows authenticated attackers to execute arbitrary code on the server. Authentication with a known username that has sufficient access permissions and/or write access to backup files is required. This vulnerability is caused by improper path sanitization in the backup restore functionality, enabling attackers to upload malicious PHP files to the web root directory. This issue has been patched in versions 16.0.72 and 17.0.7.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 44% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SE
security-reporting · FreePBX
< 16.0.72; < 17.0.7 · source: vendor
FR
Freepbx · Sangoma
16.0 before 16.0.72; 17.0 before 17.0.7 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-54708
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-54708
x_refsource_CONFIRM
https://github.com/FreePBX/security-reporting/security/advisories/GHSA-5hhg-w366-g6fh
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