CVE-2026-73462
Description
On affected platforms running Arista EOS with IGMP (Internet Group Management Protocol) snooping configured (enabled by default on all VLANs), a network-adjacent unauthenticated attacker can send malformed network packets on an affected VLAN to cause the IGMP snooping agent to terminate unexpectedly. This results in a temporary disruption of multicast traffic management, which may cause multicast traffic to be flooded to all ports of the affected VLAN until the service recovers. Repeated exploitation could result in a prolonged loss of intended multicast forwarding behavior.
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Arista Networks EOS | 4.36.0 ≤ v ≤ 4.36.1F, 4.35.0 ≤ v ≤ 4.35.5M, 4.34.0 ≤ v ≤ 4.34.7.1M, 4.33.0 ≤ v ≤ 4.33.8M | — |
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