CVE-2026-19640

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.

Score

CVSS 3.1 4.2 Medium

Status

Awaiting Analysis - psirt@arista.com

Published

2026-09-16

Last modified

2026-09-16

Weaknesses

CWE-863

Affected products

• Eos (Arista Networks)

References

• https://www.arista.com/en/support/advisories-notices/security-advisory/24726-security-advisory-0170