VulnerabilityModified
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.
MEDIUM 5.9EPSS 0.85%
Does this matter?
Lower severity and a low EPSS score (0.85%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.9 MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
- EPSS
- 0.85% probability · 58th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-295
- Affected
- 2n/access unit 2.0 firmware
- Source
- cve@mitre.org
EPSS 0.8% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://cds.thalesgroup.com/en/tcs-cert/CVE-2021-31399
- https://excellium-services.com/cert-xlm-advisory/cve-2021-31399/Third Party Advisory
- https://www.2n.cz/en_GB/products/ip-access-control/2n-access-unit-2Vendor Advisory
- https://excellium-services.com/cert-xlm-advisory/cve-2021-31399/Third Party Advisory
- https://www.2n.cz/en_GB/products/ip-access-control/2n-access-unit-2Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.