CVE-2026-73435
Security Advisory 0171
CVSS Score
8.2
EPSS Score
0.0%
EPSS Percentile
0th
On affected platforms running Arista EOS with Open Shortest Path First version 2 (OSPFv2) configured, a specially crafted OSPFv2 packet from an unauthenticated attacker on the same broadcast segment, with OSPFv2 authentication configured can cause adjacency flapping and packet loss. The disruption can affect routing across the broader OSPF domain.
| CWE | CWE-345 |
| Vendor | arista networks |
| Product | eos |
| Published | Sep 16, 2026 |
| Last Updated | Sep 16, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Arista Networks / EOS
4.36.0F ≤ 4.36.1F 4.35.0F ≤ 4.35.5M 4.34.0F ≤ 4.34.7M 4.33.0F ≤ 4.33.9M 1.0.0 < 4.33.0F