CVE-2026-73455

Security Advisory 0173

State: Published
Severity: 8.9 High
Published: Sep 16, 2026
Updated: Sep 16, 2026
Reserved: Aug 12, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	8.9 High	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H	Arista
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	Arista

Weaknesses

CWE-130 Improper Handling of Length Parameter Inconsistency

Affected Products

Product	Versions
EOSArista Networks	1.0.0 to before 4.33.0FAffected 4.33.0F through 4.33.8MAffected 4.34.0F through 4.34.6MAffected 4.35.0F through 4.35.4MAffected 4.36.0F through 4.36.0.1FAffected

References

https://www.arista.com/en/support/advisories-notices/security-advisory/24729-security-advisory-0173vendor-advisory

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