CVE-2026-121290
Security Advisory 0209
CVSS Score
8.2
EPSS Score
0.0%
EPSS Percentile
0th
On affected platforms running Arista EOS with Border Gateway Protocol (BGP) changing the BGP listen port from its default value disables default protective Access Control List (ACL) rules against unexpected BGP peering attempts.
| CWE | CWE-420 |
| Vendor | arista networks |
| Product | eos |
| Published | Nov 10, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Arista Networks / EOS
4.36.0F ≤ 4.36.2F 4.35.0F ≤ 4.35.6M 4.34.0F ≤ 4.34.8M 4.33.0F ≤ 4.33.10M 4.32.0F < 4.33.0F 1.0.0 < 4.32.0F