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VULNERABILITIES

CVE-2026-73446 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:7.4 HIGHVector:CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://www.arista.com/en/support/advisories-notices/security-advisory/24716-security-advisory-0160 [email protected]

Weakness Enumeration

CWE-IDCWE NameSource
CWE-696Incorrect Behavior Order[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-73446
NVD Published Date:
Sep 16, 2026
NVD Last Modified:
Sep 16, 2026
Source:
[email protected]
CVE-2026-73446 Details - Not Deferred