CVE-2021-45490
CRITICALCVSS 9.1/10EPSS 1.07%
Last modified
CVE-2021-45490 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. 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.. EPSS estimates a 1.07% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| 3cx | 3cx | <= 18.0.4 |
| 3cx | 3cx | <= 18.0.11 |
| 3cx | 3cx | <= 2022-03-17 |
References
- https://packetstormsecurity.com/files/166376/3CX-Client-Missing-TLS-Validation.htmlThird Party Advisory, VDB Entry
- https://www.3cx.com/community/forums/posts-articles-news/Vendor Advisory
- https://packetstormsecurity.com/files/166376/3CX-Client-Missing-TLS-Validation.htmlThird Party Advisory, VDB Entry
- https://www.3cx.com/community/forums/posts-articles-news/Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is 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.
How severe is CVE-2021-45490?
CVE-2021-45490 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 1.07% probability of exploitation in the next 30 days.
How do I fix CVE-2021-45490?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-45490?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST