CVE-2021-31399
MEDIUMCVSS 5.9/10EPSS 0.85%
Last modified
CVE-2021-31399 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. On 2N Access Unit 2.0 2.31.0.40.5 devices, an attacker can pose as the web relay for a man-in-the-middle attack.. EPSS estimates a 0.85% chance of exploitation in the next 30 days.
Description
On 2N Access Unit 2.0 2.31.0.40.5 devices, an attacker can pose as the web relay for a man-in-the-middle attack.
Metrics
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| 2n | Access Unit 2.0 Firmware | 2.31.0.40.5 |
References
- https://excellium-services.com/cert-xlm-advisory/cve-2021-31399/Third Party Advisory
- https://excellium-services.com/cert-xlm-advisory/cve-2021-31399/Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-31399?
On 2N Access Unit 2.0 2.31.0.40.5 devices, an attacker can pose as the web relay for a man-in-the-middle attack.
How severe is CVE-2021-31399?
CVE-2021-31399 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 0.85% probability of exploitation in the next 30 days.
How do I fix CVE-2021-31399?
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-2021-31399?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST