Medium severity · published Jun 4, 2026
CVE-2023-5502
On affected platforms running Arista EOS with 802.1x authentication configured on the access/trunk ports, a malicious supplicant may bypass authentication.
5.9
CVSS
0.3%
EPSS
No
On KEV
Description
On affected platforms running Arista EOS with 802.1x authentication configured on the access/trunk ports, and routing enabled on the access VLAN of the ports, a malicious supplicant may be able to bypass the requirement to perform 802.1x authentication.
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)0.3% · higher than 25% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EO
EOS · Arista Networks
4.31.0 through 4.31.0F; 4.30.0 through 4.30.4M; 4.29.0 through 4.29.6M; 4.28.0 through 4.28.8M; 4.27.0 through 4.27.11M; 4.26.0 through 4.26.11M; +2 more · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-5502
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-5502
www.arista.com
https://www.arista.com/en/support/advisories-notices/security-advisory/19462-security-advisory-0096
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