---
id: "CVE-2026-121293"
page: "https://infrastack.ai/live/CVE-2026-121293"
kind: "vulnerability"
aliases: ["CVE-2026-121293"]
title: "Arista EOS: crafted BGP message crashes routing process and resets sessions"
severity: "medium"
cvss: 6.9
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["arista-eos", "bgp", "infrastructure", "network-devices"]
not_affected_if: ["no-dps-address-family", "no-untrusted-bgp-peers"]
published_at: "2026-11-10T20:18:55+00:00"
first_seen_at: "2026-11-10T20:46:03+00:00"
updated_at: "2026-11-10T20:47:59+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-121293", "first_seen_at": "2026-11-10T20:46:03+00:00"}]
exploit_sources: []
---

# Arista EOS: crafted BGP message crashes routing process and resets sessions

Link for people: https://infrastack.ai/live/CVE-2026-121293 (this .md is for agents)

On affected Arista EOS-based network platforms, a peer that controls a BGP session with the Dynamic Path Selection address family can send a crafted BGP message. This terminates the BGP process, resetting all BGP sessions and disrupting routing until the process restarts.

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

## Timeline

- 2026-11-10T20:46:03+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-121293

## From the sources

On affected EOS-based platforms, an attacker who controls a Border Gateway Protocol (BGP) peer can send a crafted BGP message over an established session with the Dynamic Path Selection (DPS) address family negotiated. This can cause the BGP process to terminate unexpectedly, resetting all BGP sessions and disrupting routing services until the process restarts.

---

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