MSRC_CVE-2026-50455

Vulnerability from csaf_microsoft - Published: 2026-07-14 07:00 - Updated: 2026-07-14 07:00
Summary
Universal Plug and Play (upnp.dll) 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-908 - Use of Uninitialized Resource
Affected products
Product Identifier Version Remediation
Windows Server 2012 6.2.9200.26226
Windows Server 2012
6.2.9200.26226
Windows Server 2012 (Server Core installation) 6.2.9200.26226
Windows Server 2012 (Server Core installation)
6.2.9200.26226
Windows Server 2012 R2 6.3.9600.23291
Windows Server 2012 R2
6.3.9600.23291
Windows Server 2012 R2 (Server Core installation) 6.3.9600.23291
Windows Server 2012 R2 (Server Core installation)
6.3.9600.23291
Windows Server 2016 10.0.14393.9339
Windows Server 2016
10.0.14393.9339
Windows 10 Version 1607 for 32-bit Systems 10.0.14393.9339
Windows 10 Version 1607 for 32-bit Systems
10.0.14393.9339
Windows 10 Version 1607 for x64-based Systems 10.0.14393.9339
Windows 10 Version 1607 for x64-based Systems
10.0.14393.9339
Windows Server 2016 (Server Core installation) 10.0.14393.9339
Windows Server 2016 (Server Core installation)
10.0.14393.9339
Windows 10 Version 1809 for 32-bit Systems 10.0.17763.9020
Windows 10 Version 1809 for 32-bit Systems
10.0.17763.9020
Windows 10 Version 1809 for x64-based Systems 10.0.17763.9020
Windows 10 Version 1809 for x64-based Systems
10.0.17763.9020
Windows Server 2019 10.0.17763.9020
Windows Server 2019
10.0.17763.9020
Windows Server 2019 (Server Core installation) 10.0.17763.9020
Windows Server 2019 (Server Core installation)
10.0.17763.9020
Windows Server 2022 10.0.20348.5386
Windows Server 2022
10.0.20348.5386
Windows 10 Version 21H2 for 32-bit Systems 10.0.19044.7548
Windows 10 Version 21H2 for 32-bit Systems
10.0.19044.7548
Windows 10 Version 21H2 for ARM64-based Systems 10.0.19044.7548
Windows 10 Version 21H2 for ARM64-based Systems
10.0.19044.7548
Windows 10 Version 21H2 for x64-based Systems 10.0.19044.7548
Windows 10 Version 21H2 for x64-based Systems
10.0.19044.7548
Windows 10 Version 22H2 for x64-based Systems 10.0.19045.7548
Windows 10 Version 22H2 for x64-based Systems
10.0.19045.7548
Windows 10 Version 22H2 for ARM64-based Systems 10.0.19045.7548
Windows 10 Version 22H2 for ARM64-based Systems
10.0.19045.7548
Windows 10 Version 22H2 for 32-bit Systems 10.0.19045.7548
Windows 10 Version 22H2 for 32-bit Systems
10.0.19045.7548
Windows 11 Version 24H2 for ARM64-based Systems 10.0.26100.8875
Windows 11 Version 24H2 for ARM64-based Systems
10.0.26100.8875
Windows 11 Version 24H2 for x64-based Systems 10.0.26100.8875
Windows 11 Version 24H2 for x64-based Systems
10.0.26100.8875
Windows Server 2025 10.0.26100.33158
Windows Server 2025
10.0.26100.33158
Windows Server 2025 (Server Core installation) 10.0.26100.33158
Windows Server 2025 (Server Core installation)
10.0.26100.33158
Windows 11 Version 25H2 for ARM64-based Systems 10.0.26200.8875
Windows 11 Version 25H2 for ARM64-based Systems
10.0.26200.8875
Windows 11 Version 25H2 for x64-based Systems 10.0.26200.8875
Windows 11 Version 25H2 for x64-based Systems
10.0.26200.8875
Windows 11 version 26H1 for x64-based Systems 10.0.28000.2269
Windows 11 version 26H1 for x64-based Systems
10.0.28000.2269
Windows 11 Version 26H1 for ARM64-based Systems 10.0.28000.2525
Windows 11 Version 26H1 for ARM64-based Systems
10.0.28000.2525
Product Identifier Version Remediation
Windows 11 Version 26H1 for ARM64-based Systems <10.0.28000.2525
Windows 11 Version 26H1 for ARM64-based Systems
<10.0.28000.2525
Vendor Fix fix
Windows 11 version 26H1 for x64-based Systems <10.0.28000.2269
Windows 11 version 26H1 for x64-based Systems
<10.0.28000.2269
Vendor Fix fix
Windows 11 Version 25H2 for x64-based Systems <10.0.26200.8875
Windows 11 Version 25H2 for x64-based Systems
<10.0.26200.8875
Vendor Fix fix
Windows 11 Version 25H2 for ARM64-based Systems <10.0.26200.8875
Windows 11 Version 25H2 for ARM64-based Systems
<10.0.26200.8875
Vendor Fix fix
Windows Server 2025 (Server Core installation) <10.0.26100.33158
Windows Server 2025 (Server Core installation)
<10.0.26100.33158
Vendor Fix fix
Windows Server 2025 <10.0.26100.33158
Windows Server 2025
<10.0.26100.33158
Vendor Fix fix
Windows 11 Version 24H2 for x64-based Systems <10.0.26100.8875
Windows 11 Version 24H2 for x64-based Systems
<10.0.26100.8875
Vendor Fix fix
Windows 11 Version 24H2 for ARM64-based Systems <10.0.26100.8875
Windows 11 Version 24H2 for ARM64-based Systems
<10.0.26100.8875
Vendor Fix fix
Windows 10 Version 22H2 for 32-bit Systems <10.0.19045.7548
Windows 10 Version 22H2 for 32-bit Systems
<10.0.19045.7548
Vendor Fix fix
Windows 10 Version 22H2 for ARM64-based Systems <10.0.19045.7548
Windows 10 Version 22H2 for ARM64-based Systems
<10.0.19045.7548
Vendor Fix fix
Windows 10 Version 22H2 for x64-based Systems <10.0.19045.7548
Windows 10 Version 22H2 for x64-based Systems
<10.0.19045.7548
Vendor Fix fix
Windows 10 Version 21H2 for x64-based Systems <10.0.19044.7548
Windows 10 Version 21H2 for x64-based Systems
<10.0.19044.7548
Vendor Fix fix
Windows 10 Version 21H2 for ARM64-based Systems <10.0.19044.7548
Windows 10 Version 21H2 for ARM64-based Systems
<10.0.19044.7548
Vendor Fix fix
Windows 10 Version 21H2 for 32-bit Systems <10.0.19044.7548
Windows 10 Version 21H2 for 32-bit Systems
<10.0.19044.7548
Vendor Fix fix
Windows Server 2022 <10.0.20348.5386
Windows Server 2022
<10.0.20348.5386
Vendor Fix fix
Windows Server 2019 (Server Core installation) <10.0.17763.9020
Windows Server 2019 (Server Core installation)
<10.0.17763.9020
Vendor Fix fix
Windows Server 2019 <10.0.17763.9020
Windows Server 2019
<10.0.17763.9020
Vendor Fix fix
Windows 10 Version 1809 for x64-based Systems <10.0.17763.9020
Windows 10 Version 1809 for x64-based Systems
<10.0.17763.9020
Vendor Fix fix
Windows 10 Version 1809 for 32-bit Systems <10.0.17763.9020
Windows 10 Version 1809 for 32-bit Systems
<10.0.17763.9020
Vendor Fix fix
Windows Server 2016 (Server Core installation) <10.0.14393.9339
Windows Server 2016 (Server Core installation)
<10.0.14393.9339
Vendor Fix fix
Windows 10 Version 1607 for x64-based Systems <10.0.14393.9339
Windows 10 Version 1607 for x64-based Systems
<10.0.14393.9339
Vendor Fix fix
Windows 10 Version 1607 for 32-bit Systems <10.0.14393.9339
Windows 10 Version 1607 for 32-bit Systems
<10.0.14393.9339
Vendor Fix fix
Windows Server 2016 <10.0.14393.9339
Windows Server 2016
<10.0.14393.9339
Vendor Fix fix
Windows Server 2012 R2 (Server Core installation) <6.3.9600.23291
Windows Server 2012 R2 (Server Core installation)
<6.3.9600.23291
Vendor Fix fix
Windows Server 2012 R2 <6.3.9600.23291
Windows Server 2012 R2
<6.3.9600.23291
Vendor Fix fix
Windows Server 2012 (Server Core installation) <6.2.9200.26226
Windows Server 2012 (Server Core installation)
<6.2.9200.26226
Vendor Fix fix
Windows Server 2012 <6.2.9200.26226
Windows Server 2012
<6.2.9200.26226
Vendor Fix fix
Threats
Impact Information Disclosure
Exploit Status Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Unlikely
Acknowledgments
AI&#39;s physical interface 03

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        "name": "Use of Uninitialized Resource"
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          "text": "Microsoft",
          "title": "Assigning CNA"
        },
        {
          "category": "faq",
          "text": "This vulnerability could allow a local, non\u2011administrator attacker to read any files that are accessible to the UPnP Device Host Service, which runs under the LOCAL SERVICE account. This may include restricted system files or configuration data that the attacker would not normally be able to access. The specific information exposed depends on the files that the service is permitted to read.",
          "title": "What type of information could be disclosed by this vulnerability?"
        }
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          "10543",
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          "summary": "CVE-2026-50455 Universal Plug and Play (upnp.dll) Information Disclosure Vulnerability - HTML",
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50455"
        },
        {
          "category": "self",
          "summary": "CVE-2026-50455 Universal Plug and Play (upnp.dll) Information Disclosure Vulnerability - CSAF",
          "url": "https://msrc.microsoft.com/csaf/advisories/2026/msrc_cve-2026-50455.json"
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            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "environmentalScore": 0.0,
            "exploitCodeMaturity": "UNPROVEN",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "remediationLevel": "OFFICIAL_FIX",
            "reportConfidence": "CONFIRMED",
            "scope": "UNCHANGED",
            "temporalScore": 4.8,
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C",
            "version": "3.1"
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            "20",
            "21",
            "22",
            "23",
            "24",
            "25",
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      "threats": [
        {
          "category": "impact",
          "details": "Information Disclosure"
        },
        {
          "category": "exploit_status",
          "details": "Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Unlikely"
        }
      ],
      "title": "Universal Plug and Play (upnp.dll) 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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Detection rules are retrieved from Rulezet.

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