CVE-2021-28494 | BDVDB-2026-160608 Detail

AristaMetamako Operating System

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

Impact#

Per CVSS v3.1: confidentiality impact none, integrity impact high, availability impact high. Attack vector: network.

Weaknesses#

CWE-287 Improper Authentication

References#

https://www.arista.com/en/support/advisories-notices/security-advisories/12916-security-advisory-68

Exploit#

No public exploit known

History#

Version 12021-09-09Record published in the CVE List.
Version 22024-08-03Most recent update recorded in the CVE List.

Published

Published: 2021-09-09
Last modified: 2024-08-03

Vendor information

Vendor: Arista
Product: Metamako Operating System

All Arista vulnerabilities

Score

9.6 Critical

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 59.2.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Authentication Issues

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
>= MOS-0.35.0 and < MOS-0.35.0
Fixed
MOS-0.35.0

Scoring System

CVSS v4.0

Not available

CVSS v3.1

9.6 Critical

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	Low
User Interaction	None
Scope	Changed
Confidentiality	None
Integrity	High
Availability	High

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).