CVE-2026-73445
Medium
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.
SeverityMedium
CVSS4.9
Exploit probability—
ProductEOS
PublishedSep 16, 2026
First seenSep 16, 2026
Weakness typeCWE-20Improper input validation
How to fix
Update
- Arista Networks EOS4.33.0F, 4.32.0F or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Arista Networks EOS | 4.36.0F ≤ v ≤ 4.36.0.1F, 4.35.0F ≤ v ≤ 4.35.5M, 4.34.0F ≤ v ≤ 4.34.7M, 4.33.0F ≤ v ≤ 4.33.8M, 4.32.0F ≤ v < 4.33.0F, 4.31.0F ≤ v < 4.32.0F | 4.33.0F, 4.32.0F |
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