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CVE-2026-20171 Cisco Nexus 3000 and 9000 Series Border Gateway Protocol Denial of Service Vulnerability

🗓️ 20 May 2026 16:06:38Reported by ciscoType 
cvelist
 cvelist
🔗 www.cve.org👁 32 Views

CVE-2026-20171 on Cisco Nexus 3000 and 9000: BGP enforce-first-as parsing flaw triggers DoS via crafted updates.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-20171
20 May 202616:06
attackerkb
Circl
CVE-2026-20171
20 May 202618:47
circl
Cisco
Cisco Nexus 3000 and 9000 Series Switches Border Gateway Protocol Denial of Service Vulnerability
20 May 202616:00
cisco
Tenable Nessus
Cisco Nexus 3000 and 9000 Series Switches BGP DoS (cisco-sa-bgp-iefab-3hb2pwtx)
29 May 202600:00
nessus
CNNVD
Cisco NX-OS Software 安全漏洞
20 May 202600:00
cnnvd
CVE
CVE-2026-20171
20 May 202616:06
cve
EUVD
EUVD-2026-31135
20 May 202616:06
euvd
NVD
CVE-2026-20171
20 May 202617:16
nvd
Positive Technologies
PT-2026-42190
20 May 202600:00
ptsecurity
RedhatCVE
CVE-2026-20171
5 Jun 202619:29
redhatcve
Rows per page
[
  {
    "vendor": "Cisco",
    "product": "Cisco NX-OS Software",
    "versions": [
      {
        "version": "10.2(1)",
        "status": "affected"
      },
      {
        "version": "10.2(1q)",
        "status": "affected"
      },
      {
        "version": "10.2(2)",
        "status": "affected"
      },
      {
        "version": "10.2(3)",
        "status": "affected"
      },
      {
        "version": "10.2(3t)",
        "status": "affected"
      },
      {
        "version": "10.2(2a)",
        "status": "affected"
      },
      {
        "version": "10.3(1)",
        "status": "affected"
      },
      {
        "version": "10.2(4)",
        "status": "affected"
      },
      {
        "version": "10.3(2)",
        "status": "affected"
      },
      {
        "version": "10.3(3)",
        "status": "affected"
      },
      {
        "version": "10.2(5)",
        "status": "affected"
      },
      {
        "version": "10.2(3v)",
        "status": "affected"
      },
      {
        "version": "10.4(1)",
        "status": "affected"
      },
      {
        "version": "10.3(99w)",
        "status": "affected"
      },
      {
        "version": "10.2(6)",
        "status": "affected"
      },
      {
        "version": "10.3(3w)",
        "status": "affected"
      },
      {
        "version": "10.3(99x)",
        "status": "affected"
      },
      {
        "version": "10.3(3o)",
        "status": "affected"
      },
      {
        "version": "10.3(4)",
        "status": "affected"
      },
      {
        "version": "10.3(3p)",
        "status": "affected"
      },
      {
        "version": "10.3(4a)",
        "status": "affected"
      },
      {
        "version": "10.4(2)",
        "status": "affected"
      },
      {
        "version": "10.3(3q)",
        "status": "affected"
      },
      {
        "version": "10.3(5)",
        "status": "affected"
      },
      {
        "version": "10.2(7)",
        "status": "affected"
      },
      {
        "version": "10.4(3)",
        "status": "affected"
      },
      {
        "version": "10.3(3x)",
        "status": "affected"
      },
      {
        "version": "10.3(4g)",
        "status": "affected"
      },
      {
        "version": "10.5(1)",
        "status": "affected"
      },
      {
        "version": "10.2(8)",
        "status": "affected"
      },
      {
        "version": "10.3(3r)",
        "status": "affected"
      },
      {
        "version": "10.3(6)",
        "status": "affected"
      },
      {
        "version": "10.4(4)",
        "status": "affected"
      },
      {
        "version": "10.3(4h)",
        "status": "affected"
      },
      {
        "version": "10.5(2)",
        "status": "affected"
      },
      {
        "version": "10.3(7)",
        "status": "affected"
      },
      {
        "version": "10.4(5)",
        "status": "affected"
      },
      {
        "version": "10.5(3)",
        "status": "affected"
      },
      {
        "version": "10.2(9)",
        "status": "affected"
      },
      {
        "version": "10.4(4g)",
        "status": "affected"
      },
      {
        "version": "10.6(1)",
        "status": "affected"
      },
      {
        "version": "10.5(3t)",
        "status": "affected"
      },
      {
        "version": "10.3(8)",
        "status": "affected"
      },
      {
        "version": "10.4(6)",
        "status": "affected"
      },
      {
        "version": "10.5(3s)",
        "status": "affected"
      },
      {
        "version": "10.5(3e)",
        "status": "affected"
      },
      {
        "version": "10.5(3o)",
        "status": "affected"
      },
      {
        "version": "10.6(1s)",
        "status": "affected"
      },
      {
        "version": "10.5(3p)",
        "status": "affected"
      }
    ],
    "defaultStatus": "unknown"
  }
]

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