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MSRC_CVE-2026-62742

Vulnerability from csaf_microsoft - Published: 2026-08-11 07:00 - Updated: 2026-09-08 07:00
Summary
Windows DHCP Server Information Disclosure Vulnerability
Severity
Important
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-191 - Integer Underflow (Wrap or Wraparound)
Affected products
Product Identifier Version Remediation
Windows Server 2012 6.2.9200.26280
Microsoft / Windows Server 2012
6.2.9200.26280
Windows Server 2012 (Server Core installation) 6.2.9200.26280
Microsoft / Windows Server 2012 (Server Core installation)
6.2.9200.26280
Windows Server 2012 R2 6.3.9600.23338
Microsoft / Windows Server 2012 R2
6.3.9600.23338
Windows Server 2012 R2 (Server Core installation) 6.3.9600.23338
Microsoft / Windows Server 2012 R2 (Server Core installation)
6.3.9600.23338
Windows Server 2016 10.0.14393.9418
Microsoft / Windows Server 2016
10.0.14393.9418
Windows Server 2016 (Server Core installation) 10.0.14393.9418
Microsoft / Windows Server 2016 (Server Core installation)
10.0.14393.9418
Windows Server 2019 10.0.17763.9121
Microsoft / Windows Server 2019
10.0.17763.9121
Windows Server 2019 (Server Core installation) 10.0.17763.9121
Microsoft / Windows Server 2019 (Server Core installation)
10.0.17763.9121
Windows Server 2022 10.0.20348.5499
Microsoft / Windows Server 2022
10.0.20348.5499
Windows Server 2022 (Server Core installation) 10.0.20348.5499
Microsoft / Windows Server 2022 (Server Core installation)
10.0.20348.5499
Windows Server 2025 10.0.26100.33296
Microsoft / Windows Server 2025
10.0.26100.33296
Windows Server 2025 (Server Core installation) 10.0.26100.33296
Microsoft / Windows Server 2025 (Server Core installation)
10.0.26100.33296
Product Identifier Version Remediation
Windows Server 2025 (Server Core installation) <10.0.26100.33296
Microsoft / Windows Server 2025 (Server Core installation)
<10.0.26100.33296
Vendor Fix fix
Vendor Fix fix
Windows Server 2025 <10.0.26100.33296
Microsoft / Windows Server 2025
<10.0.26100.33296
Vendor Fix fix
Vendor Fix fix
Windows Server 2022 (Server Core installation) <10.0.20348.5499
Microsoft / Windows Server 2022 (Server Core installation)
<10.0.20348.5499
Vendor Fix fix
Vendor Fix fix
Windows Server 2022 <10.0.20348.5499
Microsoft / Windows Server 2022
<10.0.20348.5499
Vendor Fix fix
Vendor Fix fix
Windows Server 2019 (Server Core installation) <10.0.17763.9121
Microsoft / Windows Server 2019 (Server Core installation)
<10.0.17763.9121
Vendor Fix fix
Windows Server 2019 <10.0.17763.9121
Microsoft / Windows Server 2019
<10.0.17763.9121
Vendor Fix fix
Windows Server 2016 (Server Core installation) <10.0.14393.9418
Microsoft / Windows Server 2016 (Server Core installation)
<10.0.14393.9418
Vendor Fix fix
Windows Server 2016 <10.0.14393.9418
Microsoft / Windows Server 2016
<10.0.14393.9418
Vendor Fix fix
Windows Server 2012 R2 (Server Core installation) <6.3.9600.23338
Microsoft / Windows Server 2012 R2 (Server Core installation)
<6.3.9600.23338
Vendor Fix fix
Windows Server 2012 R2 <6.3.9600.23338
Microsoft / Windows Server 2012 R2
<6.3.9600.23338
Vendor Fix fix
Windows Server 2012 (Server Core installation) <6.2.9200.26280
Microsoft / Windows Server 2012 (Server Core installation)
<6.2.9200.26280
Vendor Fix fix
Windows Server 2012 <6.2.9200.26280
Microsoft / Windows Server 2012
<6.2.9200.26280
Vendor Fix fix
Threats
Impact Information Disclosure
Exploit Status Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely

{
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        "title": "Additional Resources"
      },
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        "text": "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.",
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      "generator": {
        "date": "2026-09-03T21:21:58.606Z",
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      },
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          "details": "6.2.9200.26280:Monthly Rollup:https://support.microsoft.com/help/5120386",
          "product_ids": [
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        },
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          "product_ids": [
            "10",
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      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "exploitCodeMaturity": "UNPROVEN",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "remediationLevel": "OFFICIAL_FIX",
            "reportConfidence": "CONFIRMED",
            "scope": "UNCHANGED",
            "temporalScore": 5.7,
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C",
            "version": "3.1"
          },
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            "1",
            "2",
            "3",
            "4",
            "5",
            "6",
            "7",
            "8",
            "9",
            "10",
            "11",
            "12"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Information Disclosure"
        },
        {
          "category": "exploit_status",
          "details": "Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely"
        }
      ],
      "title": "Windows DHCP Server Information Disclosure 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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