CVE-2026-73460 — MEDIUM (6.1)

Vulnerability Description

On affected platforms running Arista EOS with IS-IS graceful restart enabled, an unauthenticated attacker who can inject a malformed IS-IS LSP PDU packet can cause the IS-IS graceful restart procedure to terminate prematurely. This may result in traffic loss following a restart event.

CVSS Score

6.1

MEDIUM

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H

Attack Vector

ADJACENT_NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Related Weaknesses (CWE)

CWE-863

References

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

FAQ

What is CVE-2026-73460?

CVE-2026-73460 is a vulnerability with a CVSS score of 6.1 (MEDIUM). On affected platforms running Arista EOS with IS-IS graceful restart enabled, an unauthenticated attacker who can inject a malformed IS-IS LSP PDU packet can cause the IS-IS graceful restart procedure...

How severe is CVE-2026-73460?

CVE-2026-73460 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-73460?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.