Vulnerability in 3cx
CVE-2021-45490
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.
Vulnerability class: Improper Certificate Validation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.011 (64.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 64.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.3cx.com/community/forums/posts-articles-news/ (Vendor Advisory)
- packetstormsecurity.com/files/166376/3CX-Client-Missing-TLS-Validation.html (VDB Entry, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-45490?
- CVE-2021-45490 is a critical-severity vulnerability in 3cx, classified under Improper Certificate Validation. CVSS score: 9.1/10. Published 2022-03-28.
- How severe is CVE-2021-45490?
- Critical severity. CVSS v3 base score is 9.1 out of 10.
- Is CVE-2021-45490 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.