CVE-2022-28005

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

An issue was discovered in the 3CX Phone System Management Console prior to version 18 Update 3 FINAL. An unauthenticated attacker could abuse improperly secured access to arbitrary files on the server (via /Electron/download directory traversal in conjunction with a path component that uses backslash characters), leading to cleartext credential disclosure. Afterwards, the authenticated attacker is able to upload a file that overwrites a 3CX service binary, leading to Remote Code Execution as NT AUTHORITY\SYSTEM on Windows installations. NOTE: this issue exists because of an incomplete fix for CVE-2022-48482.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-522

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

https://medium.com/%40frycos/pwning-3cx-phone-management-backends-from-the-internet-d0096339dd88
https://www.3cx.com/blog/change-log/phone-system-change-log/Release Notes, Vendor Advisory
https://www.3cx.com/blog/releases/v18-security-hotfix/Release Notes, Vendor Advisory
https://www.3cx.com/blog/releases/v18-update-3-final/Release Notes, Vendor Advisory
https://medium.com/%40frycos/pwning-3cx-phone-management-backends-from-the-internet-d0096339dd88
https://www.3cx.com/blog/change-log/phone-system-change-log/Release Notes, Vendor Advisory
https://www.3cx.com/blog/releases/v18-security-hotfix/Release Notes, Vendor Advisory
https://www.3cx.com/blog/releases/v18-update-3-final/Release Notes, Vendor Advisory

Timeline

Published: May 6, 2022
Last modified: Jun 17, 2026
NVD status: Modified

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