CVE-2026-73463

Security Advisory 0169

MEDIUM

5.3

CVSS Score

Published: September 16, 2026 at 09:02 AM UTC

Updated: September 16, 2026 at 07:24 PM UTC

1 product affected across 1 vendorArista EOS

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Severity

MEDIUM5.3

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

Description

On affected platforms running Arista EOS, when multiple gRPC Network Security Interface (gNSI) transports are configured, a race condition in the gNSI Authz service may cause a policy rotation to fail silently. An authenticated user whose access was revoked by the new policy may retain unauthorized access to gRPC interfaces. This does not affect Bootz. This issue was discovered internally by Arista, and the company is not aware of any malicious exploitation of this vulnerability in customer networks.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Arista EOS · Arista Networks

60%

4.31.0F ≤ v ≤ 4.31.10M4.32.0F ≤ v ≤ 4.32.11M4.33.0F ≤ v ≤ 4.33.8M4.34.0F ≤ v ≤ 4.34.7M4.35.0F ≤ v ≤ 4.35.5M4.36.0F ≤ v ≤ 4.36.0.1F4.31.0F 4.32.0F 4.33.0F 4.34.0F 4.35.0F 4.36.0F

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://www.arista.com/en/support/advisories-notices/security-advisory/24725-security-advisory-0169

References (1)

Vendor Advisory

Source: cverecord

https://www.arista.com/en/support/advisories-notices/security-advisory/24725-security-advisory-0169

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMArista

Vector?

Quick Info

StatusAWAITING ANALYSIS

CWE

CWE-362

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