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CVE-2026-73435

Security Advisory 0171

CVSS 3.1 8.2 HIGHCVSS 4.0 7.0 HIGHCheck source for fixed versionsKEV status unknown
Original advisory

cve-program · CVE-2026-73435

Published

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.

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Affected versions, risk and source history

Exploitation and risk

Source status

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cve-program · CVE-2026-73435

Published

Security Advisory 0171

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.

Source published
16 Sep 2026 09:19:47 UTC
Source modified
16 Sep 2026 15:29:43 UTC
Saved here
23 Oct 2026 15:48:27 UTC
Source terms
CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

Source: cve-program · CVE Program Terms of Use. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS 3.1 · 8.2 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:H

CVSS 4.0 · 7.0 CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H

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Sources read 13 Nov 10:02 UTC · 274 of 275 readable · 272 fully read · documentation 469/469 current

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