HIGH 7.0 NVD

CVE-2026-73446

On affected platforms running Arista EOS with IS-IS configured on a broadcast interface, an unauthenticated attacker can send a crafted IS-IS Hello Protocol Dat

On affected platforms running Arista EOS with IS-IS configured on a broadcast interface, an unauthenticated attacker can send a crafted IS-IS Hello Protocol Data Unit (PDU) that causes the device to tear down an established IS-IS adjacency. This may result in traffic disruption and loss of IP reachability for prefixes advertised through that adjacency.

References

https://www.arista.com/en/support/advisories-notices/security-advisory/24716-security-advi

Published: 2026-09-16 · Source: NVD · Feed updated: 2026-09-16

This high severity vulnerability with a CVSS score of 7.0 was published on 2026-09-16 via NVD.

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