CVE record · 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.

CVSS 6.9 MediumEPSS 0.0028 · 20th percentile

Published by the CVE Program (CNA: Arista) at 4 Jun 2026, 22:08 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Arista Networks	EOS	affected 4.32.0 to 4.32.0.1F, inclusive custom affected 4.31.0 to 4.31.2F, inclusive custom affected 4.30.0 to 4.30.6M, inclusive custom affected 4.29.0 to 4.29.7M, inclusive custom affected 4.28.0 to 4.28.10.1M, inclusive custom affected 4.27.2F to before 4.28.0 custom Other versions: unaffected

Identifiers: CVE-2024-27891
CNA: Arista
Weakness (CWE): CWE-284
Tags: Arista Networks EOS
Broken access control
Published: 4 Jun 2026
Updated: 5 Jun 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
6.9	Medium	4.0	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N	CNA (Arista)Used for this record
5.3	Medium	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N	CNA (Arista)

CISA KEV Not listed.
EPSS 0.0028, the 20th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 4 Jun 2026. New records show when each source confirmed them.

Sources

References from the CNA

www.arista.com/en/support/advisories-notices/security-advisory/19908-security-advisory-0102

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.