What’s Vulnerable › Vulnerabilities

CVE-2021-31399

• Severity: medium (CVSS 5.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-08-13 · updated 2026-06-17
• Weakness: CWE-295

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.

Affected products

• 2N Access Unit 2.0 Firmware: 2.31.0.40.5

References

• https://cds.thalesgroup.com/en/tcs-cert/CVE-2021-31399
• https://excellium-services.com/cert-xlm-advisory/cve-2021-31399/
• https://www.2n.cz/en_GB/products/ip-access-control/2n-access-unit-2
• https://excellium-services.com/cert-xlm-advisory/cve-2021-31399/
• https://www.2n.cz/en_GB/products/ip-access-control/2n-access-unit-2

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