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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| 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 – < 4.33.0F, 4.31.0F – < 4.32.0F | 4.33.0F |
Advisories 1
- WID-SEC-2026-3441 Arista EOS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 16, 2026
References
- Security Advisory 0167 vendor-advisory