CVE-2023-5502 Auth bypass in EOS
A malicious supplicant can bypass 802.1x authentication on Arista EOS devices when routing is enabled on the access VLAN.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-5502?
CVE-2023-5502 is a high-severity authentication bypass vulnerability in Arista Networks EOS, published on 4 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-287
Which versions are affected by CVE-2023-5502?
How do I fix CVE-2023-5502?
No fix has been published for CVE-2023-5502 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2023-5502 being exploited?
There is no known exploitation of CVE-2023-5502 in the wild and no public exploit code.
Sources
Also known as GHSA-q5p5-569h-ccvx.