CVE-2025-2826 – Arista EOS Ingress ACL Enforcement Vulnerability

The following table lists the changes that have been made to the
CVE-2025-2826 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by [email protected]

    May. 27, 2025

    Action Type Old Value New Value
    Added Description n affected platforms running Arista EOS, ACL policies may not be enforced. IPv4 ingress ACL, MAC ingress ACL, or IPv6 standard ingress ACL enabled on one or more ethernet or LAG interfaces may result in ACL policies not being enforced for ingress packets. This can cause incoming packets to incorrectly be allowed or denied. The two symptoms of this issue on the affected release and platform are:

    * Packets which should be permitted may be dropped and,
    * Packets which should be dropped may be permitted.

    Added CVSS V3.1 AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
    Added CWE CWE-1284
    Added Reference https://www.arista.com/en/support/advisories-notices/security-advisory/21414-security-advisory-0120
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