CVE-2026-73435Security Advisory 0171
Updated under an hour ago ()
Does this affect you?
It affects Arista Networks EOS. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 8.2 HIGH (v3.1, CNA)CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:H
- Weakness (CWE)
- CWE-345
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Arista
- NVD analysis
- Awaiting Analysis
- Record last updated
- Sep 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Arista Networks EOS arista_networks:eos (from the name) | from 4.36.0F through 4.36.1F; from 4.35.0F through 4.35.5M; from 4.34.0F through 4.34.7M; from 4.33.0F through 4.33.9M; from 1.0.0 before 4.33.0F | CNA record |
References
- https://www.arista.com/en/support/advisories-notices/security-advisory/24727-security-advisory-0171vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.