Quick answers
- Is CVE-2023-5502 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2023-5502 being exploited in the wild.
- How severe is CVE-2023-5502?
- Medium severity, with a CVSS score of 5.9, published 4 June 2026.
- Which products and versions are affected?
- Arista Networks EOS.
- Is there a fix for CVE-2023-5502?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2023-5502 attacked?
- It is attacked over the network, in an operating system.
- Am I affected by CVE-2023-5502?
- Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
An improper authentication vulnerability (CWE-287) exists in Arista EOS when 802.1x authentication is configured on access or trunk ports and routing is enabled on the associated access VLAN. Under these specific conditions, a malicious supplicant can bypass the 802.1x authentication process. The attack vector is network-based, though it requires a high complexity (AC:H) likely due to the specific configuration requirements and timing needed to trigger the bypass. Successful exploitation allows an unauthorized device to gain network connectivity that should have been restricted by port-based NAC.
Affected products
- Arista Networks EOS
Timeline
- 2026-06-04: advisory: Security advisory published by Arista Networks