Medium severity · published Aug 13, 2021
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
5.9
CVSS
0.8%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 58% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AU
Access Unit 2.0 Firmware · 2n
2.31.0.40.5 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-31399
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-31399
cds.thalesgroup.com
https://cds.thalesgroup.com/en/tcs-cert/CVE-2021-31399
Third Party Advisory
https://excellium-services.com/cert-xlm-advisory/cve-2021-31399/
Vendor Advisory
https://www.2n.cz/en_GB/products/ip-access-control/2n-access-unit-2