CVE record · CVE-2021-28505

On affected Arista EOS platforms, if a VXLAN match rule exists in an IPv4 access-list that is applied to the ingress of an L2 or an L3 port/SVI, the VXLAN rule and subsequent ACL rules in that access…

CVSS 7.5 HighEPSS 0.0088 · 59th percentile

Published by the CVE Program (CNA: Arista) at 14 Apr 2022, 20:05 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 4.26.3M to 4.26.0, inclusive custom affected 4.27.0F to 4.27.0, inclusive custom

Identifiers: CVE-2021-28505
CNA: Arista
Weakness (CWE): CWE-284
Tags: Arista Networks EOS
Broken access control
Published: 14 Apr 2022
Updated: 16 Sept 2024

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
7.5	High	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N	CNA (Arista)

CISA KEV Not listed.
EPSS 0.0088, the 59th 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 14 Apr 2022. New records show when each source confirmed them.

Sources

References from the CNA

www.arista.com/en/support/advisories-notices/security-advisories/15267-security-advisory-0073

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.