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TI-2021-09602 Aliases CVE-2021-28494GHSA-p97q-qr3w-x236

Improper authentication in Arista Metamako Operating System

Priority MEDIUM 43CWE-287Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
None · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-287.

Summary

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

Why it matters now

EPSS 0.00875 59th percentileScored 2026-11-07
Fix Fixed Metamako Operating System (Arista): MOS-0.35.0

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
AristaMetamako Operating SystemMOS-0.35.0 to before MOS-0.35.0MOS-0.35.0Patch availableCNA
  • Metamako Operating System VendorArista Affected MOS-0.35.0 to before MOS-0.35.0 Fixed in MOS-0.35.0 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:arista:metamako_operating_system:*:*:*:*:*:*:*:*up to 0.34.0VulnerableArista
cpe:2.3:h:arista:7130:-:*:*:*:*:*:*:*not specified by NVDRunning onArista
  • cpe:2.3:o:arista:metamako_operating_system:*:*:*:*:*:*:*:* Versions up to 0.34.0 Vulnerable ·Arista
  • cpe:2.3:h:arista:7130:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista

Remediation

  • Fix · CNA Metamako Operating System (Arista) Fixed in MOS-0.35.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-28494
  2. 2026-10-03 Alias added: GHSA-p97q-qr3w-x236

References

Advisory 1

  • TI-2021-09603 Improper authentication in Arista Metamako Operating System CVSS 3.1CRITICAL 9.8
  • TI-2021-09606 Credentials management flaw in Arista Metamako Operating System CVSS 3.1HIGH 8.7
  • TI-2021-09601 Improper authentication in Arista Metamako Operating System CVSS 3.1HIGH 8.4
  • TI-2021-09605 Access control flaw in Arista Metamako Operating System CVSS 3.1HIGH 7.8
  • TI-2021-09607 Credentials management flaw in Arista Metamako Operating System CVSS 3.1MEDIUM 6.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences