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CVE-2026-20084

🗓️ 25 Mar 2026 16:02:39Reported by ciscoType 
cvelist
 cvelist
🔗 www.cve.org👁 18 Views

Cisco IOS XE DHCP snooping flaw on Catalyst 9000 allows unauthenticated BOOTP across VLANs, causing DoS.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
Circl
CVE-2026-20084
25 Mar 202617:05
circl
Cisco
Cisco IOS XE Software for Catalyst 9000 Series Switches DHCP Snooping Denial of Service Vulnerability
25 Mar 202616:00
cisco
CNNVD
Cisco IOS XE Software 资源管理错误漏洞
25 Mar 202600:00
cnnvd
CVE
CVE-2026-20084
25 Mar 202616:02
cve
EUVD
EUVD-2026-15431
25 Mar 202618:31
euvd
NCSC
Vulnerabilities fixed in Cisco IOS XE Software
26 Mar 202609:50
ncsc
NVD
CVE-2026-20084
25 Mar 202616:16
nvd
Positive Technologies
PT-2026-27790
25 Mar 202600:00
ptsecurity
RedhatCVE
CVE-2026-20084
26 Mar 202617:00
redhatcve
Vulnrichment
CVE-2026-20084
25 Mar 202616:02
vulnrichment
Rows per page
[
  {
    "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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