CVE-2026-73455 Arista EOS - Denial of Service

Arista EOS with Open Shortest Path First version 3 (OSPFv3) contains a denial of service caused by specially crafted packets triggering unexpected OSPFv3 agent restarts, letting remote attackers cause service disruption, exploit requires network access.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.50% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
16 September 2026
Updated
15 October 2026
Weakness
CWE-130

Vendor fix

Update to the latest version of Arista EOS with OSPFv3.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

← All CVEs