What’s Vulnerable › Vulnerabilities
CVE-2026-19640: Security Advisory 0170
- Severity: medium (CVSS 4.2 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-09-16 · updated 2026-09-16
- Weakness: CWE-863
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.
Affected products
- Arista Networks EOS: from 4.36.0F through 4.36.0.1F; from 4.35.0F through 4.35.5M; from 4.34.0F through 4.34.7M; from 4.33.0F through 4.33.8M; from 4.24.0F before 4.33.0F — fixed in 4.33.0F
How to fix
Upgrade to a fixed version: Arista Networks EOS 4.33.0F. Check the vendor advisory for mitigations.
References
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