CVE-2026-73436 — MEDIUM (6.5)

Vulnerability Description

On affected platforms running Arista EOS with OSPFv2 and OSPFv2 segment routing configured, a specially crafted OSPFv2 packet from an adjacent OSPF neighbor may cause OSPF to restart unexpectedly.

CVSS Score

6.5

MEDIUM

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

Attack Vector

ADJACENT_NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Related Weaknesses (CWE)

CWE-125 CWE-1284

References

https://www.arista.com/en/support/advisories-notices/security-advisory/24727-sec

FAQ

What is CVE-2026-73436?

CVE-2026-73436 is a vulnerability with a CVSS score of 6.5 (MEDIUM). On affected platforms running Arista EOS with OSPFv2 and OSPFv2 segment routing configured, a specially crafted OSPFv2 packet from an adjacent OSPF neighbor may cause OSPF to restart unexpectedly.

How severe is CVE-2026-73436?

CVE-2026-73436 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-73436?

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