MSRC_CVE-2026-41089

Vulnerability from csaf_microsoft - Published: 2026-05-12 07:00 - Updated: 2026-05-12 07:00
Summary
Windows Netlogon Remote Code Execution Vulnerability
Severity
Critical
Notes
Additional Resources: To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle
Disclaimer: The information provided in the Microsoft Knowledge Base is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.
Customer Action: Required. The vulnerability documented by this CVE requires customer action to resolve.
CWE-121 - Stack-based Buffer Overflow
Affected products
Product Identifier Version Remediation
Windows Server 2012 6.2.9200.26079
Windows Server 2012
6.2.9200.26079
Windows Server 2012 (Server Core installation) 6.2.9200.26079
Windows Server 2012 (Server Core installation)
6.2.9200.26079
Windows Server 2012 R2 6.3.9600.23181
Windows Server 2012 R2
6.3.9600.23181
Windows Server 2012 R2 (Server Core installation) 6.3.9600.23181
Windows Server 2012 R2 (Server Core installation)
6.3.9600.23181
Windows Server 2016 10.0.14393.9140
Windows Server 2016
10.0.14393.9140
Windows Server 2016 (Server Core installation) 10.0.14393.9140
Windows Server 2016 (Server Core installation)
10.0.14393.9140
Windows Server 2019 10.0.17763.8755
Windows Server 2019
10.0.17763.8755
Windows Server 2019 (Server Core installation) 10.0.17763.8755
Windows Server 2019 (Server Core installation)
10.0.17763.8755
Windows Server 2022 10.0.20348.5139
Windows Server 2022
10.0.20348.5139
Windows Server 2022 (Server Core installation) 10.0.20348.5139
Windows Server 2022 (Server Core installation)
10.0.20348.5139
Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.2330
Windows Server 2022, 23H2 Edition (Server Core installation)
10.0.25398.2330
Windows Server 2025 10.0.26100.32860
Windows Server 2025
10.0.26100.32860
Windows Server 2025 (Server Core installation) 10.0.26100.32860
Windows Server 2025 (Server Core installation)
10.0.26100.32860
Product Identifier Version Remediation
Windows Server 2025 (Server Core installation) <10.0.26100.32860
Windows Server 2025 (Server Core installation)
<10.0.26100.32860
Vendor Fix fix
Vendor Fix fix
Windows Server 2025 <10.0.26100.32860
Windows Server 2025
<10.0.26100.32860
Vendor Fix fix
Vendor Fix fix
Windows Server 2022, 23H2 Edition (Server Core installation) <10.0.25398.2330
Windows Server 2022, 23H2 Edition (Server Core installation)
<10.0.25398.2330
Vendor Fix fix
Windows Server 2022 (Server Core installation) <10.0.20348.5139
Windows Server 2022 (Server Core installation)
<10.0.20348.5139
Vendor Fix fix
Vendor Fix fix
Windows Server 2022 <10.0.20348.5139
Windows Server 2022
<10.0.20348.5139
Vendor Fix fix
Vendor Fix fix
Windows Server 2019 (Server Core installation) <10.0.17763.8755
Windows Server 2019 (Server Core installation)
<10.0.17763.8755
Vendor Fix fix
Windows Server 2019 <10.0.17763.8755
Windows Server 2019
<10.0.17763.8755
Vendor Fix fix
Windows Server 2016 (Server Core installation) <10.0.14393.9140
Windows Server 2016 (Server Core installation)
<10.0.14393.9140
Vendor Fix fix
Windows Server 2016 <10.0.14393.9140
Windows Server 2016
<10.0.14393.9140
Vendor Fix fix
Windows Server 2012 R2 (Server Core installation) <6.3.9600.23181
Windows Server 2012 R2 (Server Core installation)
<6.3.9600.23181
Vendor Fix fix
Windows Server 2012 R2 <6.3.9600.23181
Windows Server 2012 R2
<6.3.9600.23181
Vendor Fix fix
Windows Server 2012 (Server Core installation) <6.2.9200.26079
Windows Server 2012 (Server Core installation)
<6.2.9200.26079
Vendor Fix fix
Windows Server 2012 <6.2.9200.26079
Windows Server 2012
<6.2.9200.26079
Vendor Fix fix
Threats
Impact Remote Code Execution
Exploit Status Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely
Acknowledgments
Windows Attack Research &amp; Protection (WARP) with <a href="https://microsoft.com/">Microsoft</a>

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  "vulnerabilities": [
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      "cwe": {
        "id": "CWE-121",
        "name": "Stack-based Buffer Overflow"
      },
      "notes": [
        {
          "category": "general",
          "text": "Microsoft",
          "title": "Assigning CNA"
        },
        {
          "category": "faq",
          "text": "An attacker could send a specially crafted network request to a Windows server that is acting as a domain controller. If successful, this could cause the Netlogon service to improperly handle the request, potentially allowing the attacker to run code on the affected system without needing to sign in or have prior access.",
          "title": "How could an attacker exploit this vulnerability?"
        }
      ],
      "product_status": {
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          "10379",
          "10483",
          "10543",
          "10816",
          "10855",
          "11571",
          "11572",
          "11923",
          "11924",
          "12244",
          "12436",
          "12437"
        ],
        "known_affected": [
          "1",
          "2",
          "3",
          "4",
          "5",
          "6",
          "7",
          "8",
          "9",
          "10",
          "11",
          "12",
          "13"
        ]
      },
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          "category": "self",
          "summary": "CVE-2026-41089 Windows Netlogon Remote Code Execution Vulnerability - HTML",
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41089"
        },
        {
          "category": "self",
          "summary": "CVE-2026-41089 Windows Netlogon Remote Code Execution Vulnerability - CSAF",
          "url": "https://msrc.microsoft.com/csaf/advisories/2026/msrc_cve-2026-41089.json"
        }
      ],
      "remediations": [
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          "date": "2026-05-12T07:00:00.000Z",
          "details": "10.0.20348.5074:Security Hotpatch Update:https://support.microsoft.com/help/5087424",
          "product_ids": [
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            "4"
          ],
          "url": "https://support.microsoft.com/help/5087424"
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          "product_ids": [
            "11",
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      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "environmentalsScore": 0.0,
            "exploitCodeMaturity": "UNPROVEN",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "remediationLevel": "OFFICIAL_FIX",
            "reportConfidence": "CONFIRMED",
            "scope": "UNCHANGED",
            "temporalScore": 8.5,
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "1",
            "2",
            "3",
            "4",
            "5",
            "6",
            "7",
            "8",
            "9",
            "10",
            "11",
            "12",
            "13"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Remote Code Execution"
        },
        {
          "category": "exploit_status",
          "details": "Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely"
        }
      ],
      "title": "Windows Netlogon Remote Code Execution Vulnerability"
    }
  ]
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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Detection rules are retrieved from Rulezet.

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