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01 Record

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.

HighPUBLISHEDCNA: Arista
CNA base score8.2 CVSS v4.0CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

02 Description

On affected platforms running Arista EOS with 802.1x authentication configured on the access/trunk ports, a malicious supplicant may bypass authentication.

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.31% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 24.4% of scored records. A rank, not a probability.
NVD base score
8.2 (CVSS v4.0), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD analysis status
Awaiting Analysis. NVD last modified this record on 2026-07-22.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-06-04 22:39Z4 MO AGO
Last updated
2026-06-05 18:30Z4 MO AGO
Reserved
2023-10-10
Assigning CNA
Arista
Record state
PUBLISHED
Severity
High (CVSS 8.2)
CNA CVSS vector
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Weaknesses
  • CWE-287Improper AuthenticationClass
Data version
5.2
Document digest
a743e709da96454cbda700566949b081d3ef45131b42c7b7e8dd18df2af7a685

05 Affected products

VendorProductVersionsPlatforms
Arista NetworksEOS4.31.0 to 4.31.0F, 4.30.0 to 4.30.4M, 4.29.0 to 4.29.6M, 4.28.0 to 4.28.8M, 4.27.0 to 4.27.11M, 4.26.0 to 4.26.11M, 4.25.0 to 4.25.11M, 4.24.0 to 4.24.11M7020R Series, 7280R/R2 Series, 7500R/R2 Series, 7280E Series, 7500E Series

06 References

07 Remediation

The recommended resolution is to upgrade to a remediated software version at your earliest convenience. Arista recommends customers move to the latest version of each release that contains all the fixes listed below. For more information about upgrading see EOS User Manual: Upgrades and Downgrades https://www.arista.com/en/um-eos/eos-upgrades-and-downgrades CVE-2023-5502 has been fixed in the following releases: * 4.32.0F and later releases in the 4.32.x train * 4.31.3M and later releases in the 4.31.x train * 4.30.5M and later releases in the 4.30.x train * 4.29.7M and later releases in the 4.29.x train Note: Products 7280E and 7500E are EOL, and there are no released versions of EOS which fix the issue on those platforms.