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OpenAdvisories
High · 8.8 CVE-2026-121287 EUVD-2026-122808GHSA-3rh6-4r66-wwg7

Security Advisory 0221

Published Nov 10, 2026 · Updated Nov 13, 2026 · Assigned by Arista

Description

An unauthenticated attacker on an adjacent network segment can send crafted RIPv2 packets to a RIP-enabled interface on the device to trigger the Rip agent crash without providing valid credentials. Repeated exploitation reliably interrupts routing service on the affected device, which may also disrupt routing for other devices that depend on it. In a worst-case scenario, the vulnerability may allow an attacker to execute arbitrary code on the affected device.

Affected products

VendorProductAffectedFixed
Arista Networks EOS 4.37.0F, 4.36.0F – ≤ 4.36.2F, 4.35.0F – ≤ 4.35.6M, 4.34.0F – ≤ 4.34.8M, 4.33.0F – ≤ 4.33.10M, 4.32.0F – < 4.33.0F, 1.0.0 – < 4.32.0F 4.33.0F

Advisories 1

References