Riskcovery

CVE-2026-73462

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 I

State
Published
Severity
7.1 High
Published
Sep 16, 2026
Updated
Sep 17, 2026
Reserved
Aug 12, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
4.07.1 HighCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:NArista
3.16.5 MediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HArista

Weaknesses

Affected Products

ProductVersions
EOSArista Networks
  • 4.36.0 through 4.36.1FAffectedfrom 4.36.2FNot affected
  • 4.35.0 through 4.35.5MAffectedfrom 4.35.6MNot affected
  • 4.34.0 through 4.34.7.1MAffectedfrom 4.34.8MNot affected
  • 4.33.0 through 4.33.8MAffectedfrom 4.33.9MNot affected

References

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