CVE-2026-73455: On affected platforms running Arista EOS with Open Shortest Path First version 3 (OSPFv3) configured, a specially crafted packet can cause the OSPFv3 agent to…

PriorityP344high7.5CVSS 3.1

AVNACLPRNUINSUCNINAH

EPSS

0.50%

40.4th percentile

On affected platforms running Arista EOS with Open Shortest Path First version 3 (OSPFv3) configured, a specially crafted packet can cause the OSPFv3 agent to restart unexpectedly.

Affected

5 ranges

Vendor	Product	Version range	Fixed in
arista_networks	eos	>= 1.0.0 < 4.33.0F	4.33.0F
arista_networks	eos	4.33.0F – 4.33.8M	—
arista_networks	eos	4.34.0F – 4.34.6M	—
arista_networks	eos	4.35.0F – 4.35.4M	—
arista_networks	eos	4.36.0F – 4.36.0.1F	—

CVSS provenance

nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

nvdv4.08.9HIGHCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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