---
id: "CVE-2026-120980"
page: "https://infrastack.ai/live/CVE-2026-120980"
kind: "vulnerability"
aliases: ["CVE-2026-120980"]
title: "Arista EOS: crafted BGP packet restarts the BGP agent on VPLS routers"
severity: "medium"
cvss: 6.0
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["arista-eos", "bgp", "infrastructure", "network-operators", "vpls"]
not_affected_if: ["no-untrusted-bgp-peers", "vpls-bgp-disabled"]
published_at: "2026-11-10T20:18:53+00:00"
first_seen_at: "2026-11-10T20:46:03+00:00"
updated_at: "2026-11-10T20:48:12+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-120980", "first_seen_at": "2026-11-10T20:46:03+00:00"}]
exploit_sources: []
---

# Arista EOS: crafted BGP packet restarts the BGP agent on VPLS routers

Link for people: https://infrastack.ai/live/CVE-2026-120980 (this .md is for agents)

On Arista EOS with VPLS-BGP enabled, an attacker who already has a BGP session with the provider edge routers can send a crafted BGP packet. That makes the BGP agent restart unexpectedly, disrupting routing.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check whether VPLS-BGP is enabled on Arista EOS devices acting as PE routers.
- Confirm the running EOS version against the affected ranges in the Arista advisory (unknown from these sources).

## Timeline

- 2026-11-10T20:46:03+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-120980

## From the sources

On affected platforms running Arista EOS with VPLS-BGP enabled, an attacker who has established a BGP session with the PE routers can send a specially crafted BGP packet to cause the BGP agent to restart unexpectedly.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_