CVE detail

CVE-2021-28494 — CVE-2021-28494

Published 2021-09-09 · Modified 2026-06-17 · Vendor arista · Product metamako_operating_system · Source nvd

CRITICAL

severity

CVSS-derived band

9.6

CVSS v3

0–10 scale

0.0088

EPSS probability

exploitation probability, 30d

56.0%

EPSS percentile

percentile vs all CVEs

NOT LISTED

CISA KEV

known exploited catalog

Description

In Arista's MOS (Metamako Operating System) software which is supported on the 7130 product line, under certain conditions, authentication is bypassed by unprivileged users who are accessing the Web UI. This issue affects: Arista Metamako Operating System MOS-0.34.0 and prior releases

Remediation

vendor remediation guidance

Upgrade to MOS-0.35.0

Product	Vulnerable range	Fixed version	Advisory
Arista Metamako Operating System	>=MOS-0.35.0<MOS-0.35.0	MOS-0.35.0	advisory ↗

References

cvedb.io · NVD · CISA KEV · FIRST EPSS · vendor advisories (CVE Program List v5). Informational only, no warranty — verify every remediation against the vendor advisory before acting on it. This product uses data from the NVD API but is not endorsed or certified by the NVD, CISA, FIRST.org or any vendor named. CVE® is a registered trademark of The MITRE Corporation.