High severity8.1NVD Advisory· Published Nov 10, 2026

CVE-2026-120979

Description

This vulnerability affects customers using Arista Pathfinder for WAN path selection with Border Gateway Protocol-Link State (BGP-LS) configured for Dynamic Path Selection (DPS). On affected platforms running Arista EOS with BGP-LS configured for DPS, an attacker who has established an authenticated BGP-LS session with the device can send a specially crafted BGP packet to cause incorrect WAN path selection and disrupt traffic forwarding.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Arista/Pathfinderllm-create

Patches

Vulnerability mechanics

References

www.arista.com/en/support/advisories-notices/security-advisory/25034-security-advisory-0212nvd

News mentions

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