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CVE-2026-121289

🗓️ 10 Nov 2026 20:09:56Reported by AristaType 
cve
 cve
🔗 web.nvd.nist.gov

Crafted packet causes BGP agent crash on Arista EOS, terminating all BGP sessions.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
cvelist
Cvelist
CVE-2026-121289 Security Advisory 0208
10 Nov 202620:09
–cvelist
nvd
NVD
CVE-2026-121289
10 Nov 202620:18
–nvd
Vulners
Node
OR
aristaeosRange4.36.0f–4.36.2f
aristaeosRange4.35.0f–4.35.6m
aristaeosRange4.34.0f–4.34.8m
aristaeosRange4.33.0f–4.33.10m
aristaeosRange4.25.1f–4.33.0f
[
  {
    "vendor": "Arista Networks",
    "product": "EOS",
    "defaultStatus": "unaffected",
    "versions": [
      {
        "version": "4.36.0F",
        "status": "affected",
        "versionType": "custom",
        "lessThanOrEqual": "4.36.2F"
      },
      {
        "version": "4.35.0F",
        "status": "affected",
        "versionType": "custom",
        "lessThanOrEqual": "4.35.6M"
      },
      {
        "version": "4.34.0F",
        "status": "affected",
        "versionType": "custom",
        "lessThanOrEqual": "4.34.8M"
      },
      {
        "version": "4.33.0F",
        "status": "affected",
        "versionType": "custom",
        "lessThanOrEqual": "4.33.10M"
      },
      {
        "version": "4.25.1F",
        "status": "affected",
        "versionType": "custom",
        "lessThan": "4.33.0F"
      }
    ],
    "platforms": [
      "710 Series",
      "720D Series",
      "720XP/722XPM Series",
      "750X Series",
      "7010TX Series",
      "7020R/R4 Series",
      "7130 Series running EOS",
      "7170 Series",
      "7050X3/X4 Series",
      "7060X/X2/X4/X5/X6/XE7 Series",
      "7260X/X3 Series",
      "7280R/R2/R3/R4 Series",
      "7300X/X3 Series",
      "7320X Series",
      "7358X4 Series",
      "7368X4 Series",
      "7388X5 Series",
      "7500R/R2/R3 Series",
      "7800R3/R4 Series",
      "7700R4 Series",
      "AWE 5000 Series",
      "AWE 7200R Series",
      "ZTX-7200 Series",
      "CloudEOS",
      "cEOS-lab",
      "vEOS-lab",
      "CloudVision eXchange, virtual or physical appliance"
    ]
  }
]

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