CVE-2026-73445

Security Advisory 0167

State: Published
Severity: 6.9 Medium
Published: Sep 16, 2026
Updated: Sep 16, 2026
Reserved: Aug 12, 2026

Description

On affected platforms running Arista EOS, an issue with the gRPC Network Security Interface (gNSI) Authz Rotate RPC may cause an incorrect Authz policy which was uploaded in the ongoing RPC stream to become active. This does not affect Bootz.

This issue was discovered internally by Arista and the company is not aware of any malicious uses of this issue in customer networks.

Scores

CVSS	Score	Vector	Source
4.0	6.9 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N	Arista
3.1	4.9 Medium	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N	Arista

Weaknesses

CWE-20 Improper Input Validation

Affected Products

Product	Versions
EOSArista Networks	4.36.0F through 4.36.0.1FAffected 4.35.0F through 4.35.5MAffected 4.34.0F through 4.34.7MAffected 4.33.0F through 4.33.8MAffected 4.32.0F to before 4.33.0FAffected 4.31.0F to before 4.32.0FAffected

References

Security Advisory 0167vendor-advisory

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