CVE-2026-73436

Security Advisory 0171

State: Published
Severity: 6.0 Medium
Published: Sep 16, 2026
Updated: Sep 16, 2026
Reserved: Aug 12, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	6.0 Medium	CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N	Arista
3.1	6.5 Medium	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	Arista

Weaknesses

CWE-1284 Improper Validation of Specified Quantity in Input
CWE-125 Out-of-bounds Read

Affected Products

Product	Versions
EOSArista Networks	4.36.0F through 4.36.1FAffected 4.35.0F through 4.35.5MAffected 4.34.0F through 4.34.7.1MAffected 4.33.0F through 4.33.9MAffected 1.0.0 to before 4.33.0FAffected

References

Security Advisory 0171vendor-advisory

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