CVE-2026-19640

Security Advisory 0170

State: Published
Severity: 2.3 Low
Published: Sep 16, 2026
Updated: Sep 16, 2026
Reserved: Aug 12, 2026

Description

On affected platforms running Arista EOS, an authenticated user with access to the gNMI (gRPC Network Management Interface) may receive incorrect authorization results, potentially allowing access beyond their currently assigned permissions.

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	2.3 Low	CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N	Arista
3.1	4.2 Medium	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N	Arista

Weaknesses

CWE-863 Incorrect Authorization

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 4.24.0F to before 4.33.0FAffected

References

Security Advisory 0170vendor-advisory

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