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Vulnerability record · CVE-2022-28005 · published 6 May 2022

CVE-2022-28005: 3cx insufficiently protected credentials vulnerability

3cx · 3cx

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.

9.8 CVSS 3.1 Critical EPSS 6.7% · top 6.3% CWE-522 · Insufficiently protected credentials
9.8CVSS 3.1 base score, v2 5.0
6.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
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 NotesVendor Advisory
https://www.3cx.com/blog/releases/v18-security-hotfix/ Release NotesVendor Advisory
https://www.3cx.com/blog/releases/v18-update-3-final/ Release NotesVendor 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 NotesVendor Advisory
https://www.3cx.com/blog/releases/v18-security-hotfix/ Release NotesVendor Advisory
https://www.3cx.com/blog/releases/v18-update-3-final/ Release NotesVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2022-28005), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.