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CVE-2026-20084

🗓️ 25 Mar 2026 16:02:39Reported by ciscoType 
cve
 cve
🔗 web.nvd.nist.gov👁 120 Views

CVE-2026-20084: DHCP snooping flaw leaks Bootstrap Protocol packets across VLANs, causing a denial of service on Catalyst 9000 switches.

Related
Detection
Affected
Refs
NVD
Vulners
Node
OR
ciscoios_xeMatch16.6.1
ciscoios_xeMatch16.6.2
ciscoios_xeMatch16.6.3
ciscoios_xeMatch16.6.4
ciscoios_xeMatch16.6.4a
ciscoios_xeMatch16.6.5
ciscoios_xeMatch16.6.6
ciscoios_xeMatch16.6.7
ciscoios_xeMatch16.6.8
ciscoios_xeMatch16.6.9
ciscoios_xeMatch16.6.10
ciscoios_xeMatch16.7.1
ciscoios_xeMatch16.8.1
ciscoios_xeMatch16.8.1a
ciscoios_xeMatch16.8.1s
ciscoios_xeMatch16.9.1
ciscoios_xeMatch16.9.1s
ciscoios_xeMatch16.9.2
ciscoios_xeMatch16.9.3
ciscoios_xeMatch16.9.4
ciscoios_xeMatch16.9.5
ciscoios_xeMatch16.9.6
ciscoios_xeMatch16.9.7
ciscoios_xeMatch16.9.8
ciscoios_xeMatch16.10.1
ciscoios_xeMatch16.10.1e
ciscoios_xeMatch16.10.1s
ciscoios_xeMatch16.11.1
ciscoios_xeMatch16.11.1b
ciscoios_xeMatch16.11.1s
ciscoios_xeMatch16.12.1
ciscoios_xeMatch16.12.1c
ciscoios_xeMatch16.12.1s
ciscoios_xeMatch16.12.2
ciscoios_xeMatch16.12.2s
ciscoios_xeMatch16.12.3
ciscoios_xeMatch16.12.3a
ciscoios_xeMatch16.12.3s
ciscoios_xeMatch16.12.4
ciscoios_xeMatch16.12.4a
ciscoios_xeMatch16.12.5
ciscoios_xeMatch16.12.5b
ciscoios_xeMatch16.12.6
ciscoios_xeMatch16.12.6a
ciscoios_xeMatch16.12.7
ciscoios_xeMatch16.12.8
ciscoios_xeMatch17.1.1
ciscoios_xeMatch17.1.1s
ciscoios_xeMatch17.1.1t
ciscoios_xeMatch17.1.3
ciscoios_xeMatch17.2.1
ciscoios_xeMatch17.2.1a
ciscoios_xeMatch17.3.1
ciscoios_xeMatch17.3.2
ciscoios_xeMatch17.3.2a
ciscoios_xeMatch17.3.3
ciscoios_xeMatch17.3.4
ciscoios_xeMatch17.3.5
ciscoios_xeMatch17.3.6
ciscoios_xeMatch17.3.7
ciscoios_xeMatch17.3.8
ciscoios_xeMatch17.3.8a
ciscoios_xeMatch17.4.1
ciscoios_xeMatch17.5.1
ciscoios_xeMatch17.6.1
ciscoios_xeMatch17.6.1y
ciscoios_xeMatch17.6.2
ciscoios_xeMatch17.6.3
ciscoios_xeMatch17.6.4
ciscoios_xeMatch17.6.5
ciscoios_xeMatch17.6.5a
ciscoios_xeMatch17.6.6
ciscoios_xeMatch17.6.6a
ciscoios_xeMatch17.6.7
ciscoios_xeMatch17.6.8
ciscoios_xeMatch17.7.1
ciscoios_xeMatch17.8.1
ciscoios_xeMatch17.9.1
ciscoios_xeMatch17.9.2
ciscoios_xeMatch17.9.3
ciscoios_xeMatch17.9.4
ciscoios_xeMatch17.9.4a
ciscoios_xeMatch17.9.5
ciscoios_xeMatch17.9.6
ciscoios_xeMatch17.9.6a
ciscoios_xeMatch17.9.7
ciscoios_xeMatch17.9.8
ciscoios_xeMatch17.10.1
ciscoios_xeMatch17.10.1b
ciscoios_xeMatch17.11.1
ciscoios_xeMatch17.12.1
ciscoios_xeMatch17.12.1z5
ciscoios_xeMatch17.12.2
ciscoios_xeMatch17.12.3
ciscoios_xeMatch17.12.4
ciscoios_xeMatch17.12.5
ciscoios_xeMatch17.13.1
ciscoios_xeMatch17.14.1
ciscoios_xeMatch17.15.1
ciscoios_xeMatch17.15.2
ciscoios_xeMatch17.15.2b
ciscoios_xeMatch17.15.3
ciscoios_xeMatch17.15.4
ciscoios_xeMatch17.15.4d
ciscoios_xeMatch17.16.1
ciscoios_xeMatch17.17.1
ciscoios_xeMatch17.18.1
[
  {
    "vendor": "Cisco",
    "product": "Cisco IOS XE Software",
    "versions": [
      {
        "version": "16.6.1",
        "status": "affected"
      },
      {
        "version": "16.6.2",
        "status": "affected"
      },
      {
        "version": "16.6.3",
        "status": "affected"
      },
      {
        "version": "16.6.4",
        "status": "affected"
      },
      {
        "version": "16.6.5",
        "status": "affected"
      },
      {
        "version": "16.6.4a",
        "status": "affected"
      },
      {
        "version": "16.6.6",
        "status": "affected"
      },
      {
        "version": "16.6.7",
        "status": "affected"
      },
      {
        "version": "16.6.8",
        "status": "affected"
      },
      {
        "version": "16.6.9",
        "status": "affected"
      },
      {
        "version": "16.6.10",
        "status": "affected"
      },
      {
        "version": "16.7.1",
        "status": "affected"
      },
      {
        "version": "16.8.1",
        "status": "affected"
      },
      {
        "version": "16.8.1a",
        "status": "affected"
      },
      {
        "version": "16.8.1s",
        "status": "affected"
      },
      {
        "version": "16.9.1",
        "status": "affected"
      },
      {
        "version": "16.9.2",
        "status": "affected"
      },
      {
        "version": "16.9.1s",
        "status": "affected"
      },
      {
        "version": "16.9.3",
        "status": "affected"
      },
      {
        "version": "16.9.4",
        "status": "affected"
      },
      {
        "version": "16.9.5",
        "status": "affected"
      },
      {
        "version": "16.9.6",
        "status": "affected"
      },
      {
        "version": "16.9.7",
        "status": "affected"
      },
      {
        "version": "16.9.8",
        "status": "affected"
      },
      {
        "version": "16.10.1",
        "status": "affected"
      },
      {
        "version": "16.10.1s",
        "status": "affected"
      },
      {
        "version": "16.10.1e",
        "status": "affected"
      },
      {
        "version": "16.11.1",
        "status": "affected"
      },
      {
        "version": "16.11.1b",
        "status": "affected"
      },
      {
        "version": "16.11.1s",
        "status": "affected"
      },
      {
        "version": "16.12.1",
        "status": "affected"
      },
      {
        "version": "16.12.1s",
        "status": "affected"
      },
      {
        "version": "16.12.1c",
        "status": "affected"
      },
      {
        "version": "16.12.2",
        "status": "affected"
      },
      {
        "version": "16.12.3",
        "status": "affected"
      },
      {
        "version": "16.12.8",
        "status": "affected"
      },
      {
        "version": "16.12.2s",
        "status": "affected"
      },
      {
        "version": "16.12.4",
        "status": "affected"
      },
      {
        "version": "16.12.3s",
        "status": "affected"
      },
      {
        "version": "16.12.3a",
        "status": "affected"
      },
      {
        "version": "16.12.4a",
        "status": "affected"
      },
      {
        "version": "16.12.5",
        "status": "affected"
      },
      {
        "version": "16.12.6",
        "status": "affected"
      },
      {
        "version": "16.12.5b",
        "status": "affected"
      },
      {
        "version": "16.12.6a",
        "status": "affected"
      },
      {
        "version": "16.12.7",
        "status": "affected"
      },
      {
        "version": "17.1.1",
        "status": "affected"
      },
      {
        "version": "17.1.1s",
        "status": "affected"
      },
      {
        "version": "17.1.1t",
        "status": "affected"
      },
      {
        "version": "17.1.3",
        "status": "affected"
      },
      {
        "version": "17.2.1",
        "status": "affected"
      },
      {
        "version": "17.2.1a",
        "status": "affected"
      },
      {
        "version": "17.3.1",
        "status": "affected"
      },
      {
        "version": "17.3.2",
        "status": "affected"
      },
      {
        "version": "17.3.3",
        "status": "affected"
      },
      {
        "version": "17.3.2a",
        "status": "affected"
      },
      {
        "version": "17.3.4",
        "status": "affected"
      },
      {
        "version": "17.3.5",
        "status": "affected"
      },
      {
        "version": "17.3.6",
        "status": "affected"
      },
      {
        "version": "17.3.7",
        "status": "affected"
      },
      {
        "version": "17.3.8",
        "status": "affected"
      },
      {
        "version": "17.3.8a",
        "status": "affected"
      },
      {
        "version": "17.4.1",
        "status": "affected"
      },
      {
        "version": "17.5.1",
        "status": "affected"
      },
      {
        "version": "17.6.1",
        "status": "affected"
      },
      {
        "version": "17.6.2",
        "status": "affected"
      },
      {
        "version": "17.6.3",
        "status": "affected"
      },
      {
        "version": "17.6.1y",
        "status": "affected"
      },
      {
        "version": "17.6.4",
        "status": "affected"
      },
      {
        "version": "17.6.5",
        "status": "affected"
      },
      {
        "version": "17.6.6",
        "status": "affected"
      },
      {
        "version": "17.6.6a",
        "status": "affected"
      },
      {
        "version": "17.6.5a",
        "status": "affected"
      },
      {
        "version": "17.6.7",
        "status": "affected"
      },
      {
        "version": "17.6.8",
        "status": "affected"
      },
      {
        "version": "17.7.1",
        "status": "affected"
      },
      {
        "version": "17.10.1",
        "status": "affected"
      },
      {
        "version": "17.10.1b",
        "status": "affected"
      },
      {
        "version": "17.8.1",
        "status": "affected"
      },
      {
        "version": "17.9.1",
        "status": "affected"
      },
      {
        "version": "17.9.2",
        "status": "affected"
      },
      {
        "version": "17.9.3",
        "status": "affected"
      },
      {
        "version": "17.9.4",
        "status": "affected"
      },
      {
        "version": "17.9.5",
        "status": "affected"
      },
      {
        "version": "17.9.4a",
        "status": "affected"
      },
      {
        "version": "17.9.6",
        "status": "affected"
      },
      {
        "version": "17.9.6a",
        "status": "affected"
      },
      {
        "version": "17.9.7",
        "status": "affected"
      },
      {
        "version": "17.9.8",
        "status": "affected"
      },
      {
        "version": "17.11.1",
        "status": "affected"
      },
      {
        "version": "17.12.1",
        "status": "affected"
      },
      {
        "version": "17.12.2",
        "status": "affected"
      },
      {
        "version": "17.12.3",
        "status": "affected"
      },
      {
        "version": "17.12.4",
        "status": "affected"
      },
      {
        "version": "17.12.5",
        "status": "affected"
      },
      {
        "version": "17.12.1z5",
        "status": "affected"
      },
      {
        "version": "17.13.1",
        "status": "affected"
      },
      {
        "version": "17.14.1",
        "status": "affected"
      },
      {
        "version": "17.15.1",
        "status": "affected"
      },
      {
        "version": "17.15.2",
        "status": "affected"
      },
      {
        "version": "17.15.3",
        "status": "affected"
      },
      {
        "version": "17.15.2b",
        "status": "affected"
      },
      {
        "version": "17.15.4",
        "status": "affected"
      },
      {
        "version": "17.15.4d",
        "status": "affected"
      },
      {
        "version": "17.16.1",
        "status": "affected"
      },
      {
        "version": "17.17.1",
        "status": "affected"
      },
      {
        "version": "17.18.1",
        "status": "affected"
      }
    ]
  }
]

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28 Sep 2026 15:18Current
7.6High risk
Vulners AI Score7.6
CVSS 3.18.6
EPSS0.00354
SSVC
120