High

Azure Active Directory Denial of Service Vulnerability

Type: advisorySource: Official CVE List1 source record

Loop with unreachable exit condition ('infinite loop') in Azure Active Directory allows an unauthorized attacker to deny service over a network.

Announced 14 Jul 2026Group revision 1

Original source ↗

CVE-2026-50653

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-50653

Azure Active Directory

Source reference: /containers/cna/affected/0/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Microsoft .NET Framework 3.5

Source reference: /containers/cna/affected/1/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Microsoft .NET Framework 3.5 AND 4.7.2

Source reference: /containers/cna/affected/2/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Microsoft .NET Framework 3.5 AND 4.8

Source reference: /containers/cna/affected/3/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Microsoft .NET Framework 3.5 AND 4.8.1

Source reference: /containers/cna/affected/4/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2

Source reference: /containers/cna/affected/5/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Microsoft .NET Framework 4.8

Source reference: /containers/cna/affected/6/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Microsoft .NET Framework 4.8.1

Source reference: /containers/cna/affected/7/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "vendor": "Microsoft",
    "product": "Azure Active Directory",
    "versions": [
      {
        "status": "affected",
        "version": "2021",
        "lessThan": "8.19.2",
        "versionType": "custom"
      }
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Microsoft .NET Framework 3.5",
    "versions": [
      {
        "status": "affected",
        "version": "3.5.0",
        "lessThan": "2.0.50727.9182 & 3.0.30729.9168",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "Windows 11 Version 26H1 for ARM64-based Systems",
      "Windows 11 version 26H1 for x64-based Systems",
      "Windows Server 2012",
      "Windows Server 2012 (Server Core installation)",
      "Windows Server 2012 R2",
      "Windows Server 2012 R2 (Server Core installation)"
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Microsoft .NET Framework 3.5 AND 4.7.2",
    "versions": [
      {
        "status": "affected",
        "version": "4.7.0",
        "lessThan": "2.0.50727.9069 & 3.0.30729.9067 & 4.7.4143.0",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "Windows 10 Version 1607 for 32-bit Systems",
      "Windows 10 Version 1607 for x64-based Systems",
      "Windows 10 Version 1809 for 32-bit Systems",
      "Windows 10 Version 1809 for x64-based Systems",
      "Windows Server 2016",
      "Windows Server 2016 (Server Core installation)",
      "Windows Server 2019",
      "Windows Server 2019 (Server Core installation)"
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Microsoft .NET Framework 3.5 AND 4.8",
    "versions": [
      {
        "status": "affected",
        "version": "4.8.0",
        "lessThan": "2.0.50727.9069 & 3.0.30729.9067 & 4.8.4803.0",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "Windows 10 Version 1809 for 32-bit Systems",
      "Windows 10 Version 1809 for x64-based Systems",
      "Windows 10 Version 21H2 for 32-bit Systems",
      "Windows 10 Version 21H2 for ARM64-based Systems",
      "Windows 10 Version 21H2 for x64-based Systems",
      "Windows 10 Version 22H2 for 32-bit Systems",
      "Windows 10 Version 22H2 for ARM64-based Systems",
      "Windows 10 Version 22H2 for x64-based Systems",
      "Windows Server 2019",
      "Windows Server 2019 (Server Core installation)",
      "Windows Server 2022",
      "Windows Server 2022 (Server Core installation)"
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Microsoft .NET Framework 3.5 AND 4.8.1",
    "versions": [
      {
        "status": "affected",
        "version": "4.8.1",
        "lessThan": "2.0.50727.9182 & 3.0.30729.9168 & 4.8.9339.0",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "Windows 10 Version 21H2 for 32-bit Systems",
      "Windows 10 Version 21H2 for ARM64-based Systems",
      "Windows 10 Version 21H2 for x64-based Systems",
      "Windows 10 Version 22H2 for 32-bit Systems",
      "Windows 10 Version 22H2 for ARM64-based Systems",
      "Windows 10 Version 22H2 for x64-based Systems",
      "Windows 11 Version 23H2 for ARM64-based Systems",
      "Windows 11 Version 23H2 for x64-based Systems",
      "Windows 11 Version 24H2 for ARM64-based Systems",
      "Windows 11 Version 24H2 for x64-based Systems",
      "Windows 11 Version 25H2 for ARM64-based Systems",
      "Windows 11 Version 25H2 for x64-based Systems",
      "Windows Server 2022",
      "Windows Server 2022 (Server Core installation)"
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2",
    "versions": [
      {
        "status": "affected",
        "version": "4.7.0",
        "lessThan": "4.7.4143.0",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "Windows Server 2012",
      "Windows Server 2012 (Server Core installation)",
      "Windows Server 2012 R2",
      "Windows Server 2012 R2 (Server Core installation)"
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Microsoft .NET Framework 4.8",
    "versions": [
      {
        "status": "affected",
        "version": "4.8.0",
        "lessThan": "4.8.4803.0",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "Windows 10 Version 1607 for 32-bit Systems",
      "Windows 10 Version 1607 for x64-based Systems",
      "Windows Server 2012",
      "Windows Server 2012 (Server Core installation)",
      "Windows Server 2012 R2",
      "Windows Server 2012 R2 (Server Core installation)",
      "Windows Server 2016",
      "Windows Server 2016 (Server Core installation)"
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Microsoft .NET Framework 4.8.1",
    "versions": [
      {
        "status": "affected",
        "version": "4.8.0.0",
        "lessThan": "4.8.9340.0",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "Windows 11 Version 26H1 for ARM64-based Systems",
      "Windows 11 version 26H1 for x64-based Systems"
    ]
  }
]

Related CVEs: CVE-2026-50653
Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event: #13441 · Revision 1
Added to Heist Feed: Sun, 25 Oct 2026 00:24:17 GMT
Publisher date: Tue, 14 Jul 2026 17:05:39 GMT

Read the original announcement

Revision history

25 Oct 2026CVE-2026-50653 · Revision 1Source updated