Critical severity · published Feb 4, 2022
CVE-2021-28503
The impact of this vulnerability is that Arista's EOS eAPI may skip re-evaluating user credentials when certificate based authentication is used, which allows remote attackers to…
9.8
CVSS
0.7%
EPSS
No
On KEV
Description
The impact of this vulnerability is that Arista's EOS eAPI may skip re-evaluating user credentials when certificate based authentication is used, which allows remote attackers to access the device via eAPI.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 54% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EO
Eos · Arista
4.22 through 4.22.9m; 4.23 through 4.23.9; 4.24 through 4.24.7; 4.25 through 4.25.5; 4.26 through 4.26.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-28503
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-28503
Mitigation
https://www.arista.com/en/support/advisories-notices/security-advisories/13605-security-advisory-0072
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