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.
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://cds.thalesgroup.com/en/tcs-cert/CVE-2021-31399
Source: Mitre, NVD
Published: 2021-08-13
Updated: 2025-05-30
Base Score: 4.3
Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N
Severity: Medium
Base Score: 5.9
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS: 0.00169