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Vulnerability record · CVE-2021-45490 · published 28 March 2022

CVE-2021-45490: 3cx improper certificate validation vulnerability

3cx · 3cx

The client applications in 3CX on Windows, the 3CX app for iOS, and the 3CX application for Android through 2022-03-17 lack SSL certificate validation.

9.1 CVSS 3.1 Critical EPSS 1.1% · top 36.1% CWE-295 · Improper certificate validation
9.1CVSS 3.1 base score, v2 6.4
1.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

The client applications in 3CX on Windows, the 3CX app for iOS, and the 3CX application for Android through 2022-03-17 lack SSL certificate validation.

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

Affected products

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

References

LinkTags
https://packetstormsecurity.com/files/166376/3CX-Client-Missing-TLS-Validation.html Third Party AdvisoryVDB Entry
https://www.3cx.com/community/forums/posts-articles-news/ Vendor Advisory
https://packetstormsecurity.com/files/166376/3CX-Client-Missing-TLS-Validation.html Third Party AdvisoryVDB Entry
https://www.3cx.com/community/forums/posts-articles-news/ Vendor 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-2021-45490), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.