NCSC-2026-0009

Vulnerability from csaf_ncscnl - Published: 2026-01-13 19:17 - Updated: 2026-01-13 19:17
Summary
Kwetsbaarheden verholpen in Microsoft Azure

Notes

The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this page to enhance access to its information and security advisories. The use of this security advisory is subject to the following terms and conditions: NCSC-NL makes every reasonable effort to ensure that the content of this page is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or continuous keeping up-to-date. The information contained in this security advisory is intended solely for the purpose of providing general information to professional users. No rights can be derived from the information provided therein. NCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of this security advisory. This includes damage resulting from the inaccuracy of incompleteness of the information contained in the advisory. This security advisory is subject to Dutch law. All disputes related to or arising from the use of this advisory will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings.
Feiten
Microsoft heeft kwetsbaarheden verholpen in diverse Azure-componenten.
Interpretaties
Een kwaadwillende kan de kwetsbaarheden misbruiken om zich verhoogde rechten toe te kennen en zo toegang te krijgen tot gevoelige gegevens of code uit te voeren waartoe de kwaadwillende aanvankelijk niet is geautoriseerd. Voor succesvol misbruik moet de kwaadwillende over voorafgaande authenticatie beschikken in het kwetsbare systeem. ``` Azure Connected Machine Agent: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-21224 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Admin Center: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20965 | 7.50 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Azure Core shared client library for Python: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-21226 | 7.50 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| ```
Oplossingen
Microsoft heeft updates beschikbaar gesteld waarmee de beschreven kwetsbaarheden worden verholpen. We raden u aan om deze updates te installeren. Meer informatie over de kwetsbaarheden, de installatie van de updates en eventuele work-arounds vindt u op: https://portal.msrc.microsoft.com/en-us/security-guidance
Kans
medium
Schade
high
CWE-121
Stack-based Buffer Overflow
CWE-347
Improper Verification of Cryptographic Signature
CWE-502
Deserialization of Untrusted Data
To clipboard 

{
  "document": {
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE"
      }
    },
    "lang": "nl",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this page to enhance access to its information and security advisories. The use of this security advisory is subject to the following terms and conditions:\n\n    NCSC-NL makes every reasonable effort to ensure that the content of this page is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or continuous keeping up-to-date. The information contained in this security advisory is intended solely for the purpose of providing general information to professional users. No rights can be derived from the information provided therein.\n\n    NCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of this security advisory. This includes damage resulting from the inaccuracy of incompleteness of the information contained in the advisory.\n    This security advisory is subject to Dutch law. All disputes related to or arising from the use of this advisory will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings."
      },
      {
        "category": "description",
        "text": "Microsoft heeft kwetsbaarheden verholpen in diverse Azure-componenten.",
        "title": "Feiten"
      },
      {
        "category": "description",
        "text": "Een kwaadwillende kan de kwetsbaarheden misbruiken om zich verhoogde rechten toe te kennen en zo toegang te krijgen tot gevoelige gegevens of code uit te voeren waartoe de kwaadwillende aanvankelijk niet is geautoriseerd.\n\nVoor succesvol misbruik moet de kwaadwillende over voorafgaande authenticatie beschikken in het kwetsbare systeem.\n\n```\nAzure Connected Machine Agent: \n|----------------|------|-------------------------------------|\n| CVE-ID         | CVSS | Impact                              |\n|----------------|------|-------------------------------------|\n| CVE-2026-21224 | 7.80 | Verkrijgen van verhoogde rechten    | \n|----------------|------|-------------------------------------|\n\nWindows Admin Center: \n|----------------|------|-------------------------------------|\n| CVE-ID         | CVSS | Impact                              |\n|----------------|------|-------------------------------------|\n| CVE-2026-20965 | 7.50 | Verkrijgen van verhoogde rechten    | \n|----------------|------|-------------------------------------|\n\nAzure Core shared client library for Python: \n|----------------|------|-------------------------------------|\n| CVE-ID         | CVSS | Impact                              |\n|----------------|------|-------------------------------------|\n| CVE-2026-21226 | 7.50 | Uitvoeren van willekeurige code     | \n|----------------|------|-------------------------------------|\n```\n",
        "title": "Interpretaties"
      },
      {
        "category": "description",
        "text": "Microsoft heeft updates beschikbaar gesteld waarmee de beschreven kwetsbaarheden worden verholpen. We raden u aan om deze updates te installeren. Meer informatie over de kwetsbaarheden, de installatie van de updates en eventuele work-arounds vindt u op:\n\nhttps://portal.msrc.microsoft.com/en-us/security-guidance",
        "title": "Oplossingen"
      },
      {
        "category": "general",
        "text": "medium",
        "title": "Kans"
      },
      {
        "category": "general",
        "text": "high",
        "title": "Schade"
      },
      {
        "category": "general",
        "text": "Stack-based Buffer Overflow",
        "title": "CWE-121"
      },
      {
        "category": "general",
        "text": "Improper Verification of Cryptographic Signature",
        "title": "CWE-347"
      },
      {
        "category": "general",
        "text": "Deserialization of Untrusted Data",
        "title": "CWE-502"
      }
    ],
    "publisher": {
      "category": "coordinator",
      "contact_details": "cert@ncsc.nl",
      "name": "Nationaal Cyber Security Centrum",
      "namespace": "https://www.ncsc.nl/"
    },
    "title": "Kwetsbaarheden verholpen in Microsoft Azure",
    "tracking": {
      "current_release_date": "2026-01-13T19:17:59.629364Z",
      "generator": {
        "date": "2025-08-04T16:30:00Z",
        "engine": {
          "name": "V.A.",
          "version": "1.3"
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      "revision_history": [
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          "date": "2026-01-13T19:17:59.629364Z",
          "number": "1.0.0",
          "summary": "Initiele versie"
        }
      ],
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    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:unknown/*",
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                }
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            ],
            "category": "product_name",
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        "name": "Improper Verification of Cryptographic Signature"
      },
      "notes": [
        {
          "category": "other",
          "text": "Improper Verification of Cryptographic Signature",
          "title": "CWE-347"
        },
        {
          "category": "description",
          "text": "A vulnerability in Windows Admin Center allows an authorized attacker to improperly verify cryptographic signatures, enabling local privilege escalation.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
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      },
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          "summary": "CVE-2026-20965 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-20965.json"
        }
      ],
      "scores": [
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C",
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          "text": "Stack-based Buffer Overflow",
          "title": "CWE-121"
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          "text": "A stack-based buffer overflow vulnerability in Azure Connected Machine Agent allows an authorized attacker to locally elevate their privileges.",
          "title": "Summary"
        }
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          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-21224.json"
        }
      ],
      "scores": [
        {
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
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            "CSAFPID-2",
            "CSAFPID-3"
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    },
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      "cwe": {
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        "name": "Deserialization of Untrusted Data"
      },
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        {
          "category": "other",
          "text": "Deserialization of Untrusted Data",
          "title": "CWE-502"
        },
        {
          "category": "description",
          "text": "The Azure Core shared client library for Python contains a vulnerability that enables an authorized attacker to execute code remotely via deserialization of untrusted data.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
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          "CSAFPID-2",
          "CSAFPID-3"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-21226 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-21226.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2",
            "CSAFPID-3"
          ]
        }
      ],
      "title": "CVE-2026-21226"
    }
  ]
}


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