Traffic Leak Vulnerability in Arista Network Switches
CVE-2026-75943
2.1LOW
What is CVE-2026-75943?
A vulnerability exists in Arista Network Switches where a brief traffic leak may occur when an authenticated supplicant is removed or times out. During this transient window, the supplicant's data traffic could bypass Access Control Lists (ACLs), potentially exposing sensitive information. This vulnerability could result in unauthorized access to traffic that should be secured.
Affected Version(s)
EOS 4.36.0 <= 4.36.1F
EOS 4.35.0 <= 4.35.5M
EOS 4.34.0 <= 4.34.7.1M
References
CVSS V4
Score:
2.1
Severity:
LOW
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None
Timeline
Vulnerability published
Vulnerability Reserved
Credit
Those issues were discovered internally by Arista, and the company is not aware of any malicious exploitation of these vulnerabilities in customer networks.