What is CVE-2024-27891?

CVE-2024-27891 is a medium-severity vulnerability in Arista Networks Eos, classified under Improper Access Control. CVSS score: 5.3/10. Published 2026-06-04.

How severe is CVE-2024-27891?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Arista Networks Eos

CVE-2024-27891

On affected platforms running Arista EOS with MACsec and egress ACLs configured on the same interfaces, the ACL policies may not be enforced for packets egressing on those ports. This can cause outgoing packets to incorrectly be allowed or…

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

Affected products

Arista Networks Eos — versions 4.32.0, 4.31.0, 4.30.0

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

psirt@arista.com

Frequently asked questions

What is CVE-2024-27891?: CVE-2024-27891 is a medium-severity vulnerability in Arista Networks Eos, classified under Improper Access Control. CVSS score: 5.3/10. Published 2026-06-04.
How severe is CVE-2024-27891?: Medium severity. CVSS v3 base score is 5.3 out of 10.