CVE-2026-73463
Security Advisory 0169
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
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 An authenticated user whose access was revoked by the new policy may retain unauthorized access to gRPC interfaces.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.
| CWE | CWE-362 |
| Vendor | arista networks |
| Product | eos |
| Published | Sep 16, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Arista Networks / EOS
4.36.0F ≤ 4.36.0.1F 4.35.0F ≤ 4.35.5M 4.34.0F ≤ 4.34.7M 4.33.0F ≤ 4.33.8M 4.32.0F ≤ 4.32.11M 4.31.0F ≤ 4.31.10M