MSRC_CVE-2026-42985

Vulnerability from csaf_microsoft - Published: 2026-06-09 07:00 - Updated: 2026-06-09 07:00
Summary
Remote Desktop Client 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-416 - Use After Free
Affected products
Product Identifier Version Remediation
Windows Server 2012 6.2.9200.26132
Windows Server 2012
6.2.9200.26132
Windows Server 2012 (Server Core installation) 6.2.9200.26132
Windows Server 2012 (Server Core installation)
6.2.9200.26132
Windows Server 2012 R2 6.3.9600.23228
Windows Server 2012 R2
6.3.9600.23228
Windows Server 2012 R2 (Server Core installation) 6.3.9600.23228
Windows Server 2012 R2 (Server Core installation)
6.3.9600.23228
Windows Server 2016 10.0.14393.9234
Windows Server 2016
10.0.14393.9234
Windows 10 Version 1607 for 32-bit Systems 10.0.14393.9234
Windows 10 Version 1607 for 32-bit Systems
10.0.14393.9234
Windows 10 Version 1607 for x64-based Systems 10.0.14393.9234
Windows 10 Version 1607 for x64-based Systems
10.0.14393.9234
Windows Server 2016 (Server Core installation) 10.0.14393.9234
Windows Server 2016 (Server Core installation)
10.0.14393.9234
Windows 10 Version 1809 for 32-bit Systems 10.0.17763.8880
Windows 10 Version 1809 for 32-bit Systems
10.0.17763.8880
Windows 10 Version 1809 for x64-based Systems 10.0.17763.8880
Windows 10 Version 1809 for x64-based Systems
10.0.17763.8880
Windows Server 2019 10.0.17763.8880
Windows Server 2019
10.0.17763.8880
Windows Server 2019 (Server Core installation) 10.0.17763.8880
Windows Server 2019 (Server Core installation)
10.0.17763.8880
Remote Desktop client for Windows Desktop 1.2.7214.0
Remote Desktop client for Windows Desktop
1.2.7214.0
Windows Server 2022 10.0.20348.5256
Windows Server 2022
10.0.20348.5256
Windows Server 2022 (Server Core installation) 10.0.20348.5256
Windows Server 2022 (Server Core installation)
10.0.20348.5256
Windows 10 Version 21H2 for 32-bit Systems 10.0.19044.7417
Windows 10 Version 21H2 for 32-bit Systems
10.0.19044.7417
Windows 10 Version 21H2 for ARM64-based Systems 10.0.19044.7417
Windows 10 Version 21H2 for ARM64-based Systems
10.0.19044.7417
Windows 10 Version 21H2 for x64-based Systems 10.0.19044.7417
Windows 10 Version 21H2 for x64-based Systems
10.0.19044.7417
Windows 10 Version 22H2 for x64-based Systems 10.0.19045.7417
Windows 10 Version 22H2 for x64-based Systems
10.0.19045.7417
Windows 10 Version 22H2 for ARM64-based Systems 10.0.19045.7417
Windows 10 Version 22H2 for ARM64-based Systems
10.0.19045.7417
Windows 10 Version 22H2 for 32-bit Systems 10.0.19045.7417
Windows 10 Version 22H2 for 32-bit Systems
10.0.19045.7417
Windows 11 Version 23H2 for ARM64-based Systems 10.0.22631.7219
Windows 11 Version 23H2 for ARM64-based Systems
10.0.22631.7219
Windows 11 Version 23H2 for x64-based Systems 10.0.22631.7219
Windows 11 Version 23H2 for x64-based Systems
10.0.22631.7219
Windows 11 Version 24H2 for ARM64-based Systems 10.0.26100.8655
Windows 11 Version 24H2 for ARM64-based Systems
10.0.26100.8655
Windows 11 Version 24H2 for x64-based Systems 10.0.26100.8655
Windows 11 Version 24H2 for x64-based Systems
10.0.26100.8655
Windows Server 2025 10.0.26100.32995
Windows Server 2025
10.0.26100.32995
Windows Server 2025 (Server Core installation) 10.0.26100.32995
Windows Server 2025 (Server Core installation)
10.0.26100.32995
Windows App Client for Windows Desktop 2.0.1193.0
Windows App Client for Windows Desktop
2.0.1193.0
Windows 11 Version 25H2 for ARM64-based Systems 10.0.26200.8655
Windows 11 Version 25H2 for ARM64-based Systems
10.0.26200.8655
Windows 11 Version 25H2 for x64-based Systems 10.0.26200.8655
Windows 11 Version 25H2 for x64-based Systems
10.0.26200.8655
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 10.0.28000.2269
Windows 11 Version 26H1 for ARM64-based Systems
10.0.28000.2269
Product Identifier Version Remediation
Windows 11 Version 26H1 for ARM64-based Systems <10.0.28000.2269
Windows 11 Version 26H1 for ARM64-based Systems
<10.0.28000.2269
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 <10.0.26200.8655
Windows 11 Version 25H2 for x64-based Systems
<10.0.26200.8655
Vendor Fix fix
Windows 11 Version 25H2 for ARM64-based Systems <10.0.26200.8655
Windows 11 Version 25H2 for ARM64-based Systems
<10.0.26200.8655
Vendor Fix fix
Windows App Client for Windows Desktop <2.0.1193.0
Windows App Client for Windows Desktop
<2.0.1193.0
Vendor Fix fix
Windows Server 2025 (Server Core installation) <10.0.26100.32995
Windows Server 2025 (Server Core installation)
<10.0.26100.32995
Vendor Fix fix
Windows Server 2025 <10.0.26100.32995
Windows Server 2025
<10.0.26100.32995
Vendor Fix fix
Windows 11 Version 24H2 for x64-based Systems <10.0.26100.8655
Windows 11 Version 24H2 for x64-based Systems
<10.0.26100.8655
Vendor Fix fix
Windows 11 Version 24H2 for ARM64-based Systems <10.0.26100.8655
Windows 11 Version 24H2 for ARM64-based Systems
<10.0.26100.8655
Vendor Fix fix
Windows 11 Version 23H2 for x64-based Systems <10.0.22631.7219
Windows 11 Version 23H2 for x64-based Systems
<10.0.22631.7219
Vendor Fix fix
Windows 11 Version 23H2 for ARM64-based Systems <10.0.22631.7219
Windows 11 Version 23H2 for ARM64-based Systems
<10.0.22631.7219
Vendor Fix fix
Windows 10 Version 22H2 for 32-bit Systems <10.0.19045.7417
Windows 10 Version 22H2 for 32-bit Systems
<10.0.19045.7417
Vendor Fix fix
Windows 10 Version 22H2 for ARM64-based Systems <10.0.19045.7417
Windows 10 Version 22H2 for ARM64-based Systems
<10.0.19045.7417
Vendor Fix fix
Windows 10 Version 22H2 for x64-based Systems <10.0.19045.7417
Windows 10 Version 22H2 for x64-based Systems
<10.0.19045.7417
Vendor Fix fix
Windows 10 Version 21H2 for x64-based Systems <10.0.19044.7417
Windows 10 Version 21H2 for x64-based Systems
<10.0.19044.7417
Vendor Fix fix
Windows 10 Version 21H2 for ARM64-based Systems <10.0.19044.7417
Windows 10 Version 21H2 for ARM64-based Systems
<10.0.19044.7417
Vendor Fix fix
Windows 10 Version 21H2 for 32-bit Systems <10.0.19044.7417
Windows 10 Version 21H2 for 32-bit Systems
<10.0.19044.7417
Vendor Fix fix
Windows Server 2022 (Server Core installation) <10.0.20348.5256
Windows Server 2022 (Server Core installation)
<10.0.20348.5256
Vendor Fix fix
Windows Server 2022 <10.0.20348.5256
Windows Server 2022
<10.0.20348.5256
Vendor Fix fix
Remote Desktop client for Windows Desktop <1.2.7214.0
Remote Desktop client for Windows Desktop
<1.2.7214.0
Vendor Fix fix
Windows Server 2019 (Server Core installation) <10.0.17763.8880
Windows Server 2019 (Server Core installation)
<10.0.17763.8880
Vendor Fix fix
Windows Server 2019 <10.0.17763.8880
Windows Server 2019
<10.0.17763.8880
Vendor Fix fix
Windows 10 Version 1809 for x64-based Systems <10.0.17763.8880
Windows 10 Version 1809 for x64-based Systems
<10.0.17763.8880
Vendor Fix fix
Windows 10 Version 1809 for 32-bit Systems <10.0.17763.8880
Windows 10 Version 1809 for 32-bit Systems
<10.0.17763.8880
Vendor Fix fix
Windows Server 2016 (Server Core installation) <10.0.14393.9234
Windows Server 2016 (Server Core installation)
<10.0.14393.9234
Vendor Fix fix
Windows 10 Version 1607 for x64-based Systems <10.0.14393.9234
Windows 10 Version 1607 for x64-based Systems
<10.0.14393.9234
Vendor Fix fix
Windows 10 Version 1607 for 32-bit Systems <10.0.14393.9234
Windows 10 Version 1607 for 32-bit Systems
<10.0.14393.9234
Vendor Fix fix
Windows Server 2016 <10.0.14393.9234
Windows Server 2016
<10.0.14393.9234
Vendor Fix fix
Windows Server 2012 R2 (Server Core installation) <6.3.9600.23228
Windows Server 2012 R2 (Server Core installation)
<6.3.9600.23228
Vendor Fix fix
Windows Server 2012 R2 <6.3.9600.23228
Windows Server 2012 R2
<6.3.9600.23228
Vendor Fix fix
Windows Server 2012 (Server Core installation) <6.2.9200.26132
Windows Server 2012 (Server Core installation)
<6.2.9200.26132
Vendor Fix fix
Windows Server 2012 <6.2.9200.26132
Windows Server 2012
<6.2.9200.26132
Vendor Fix fix
Threats
Impact Remote Code Execution
Exploit Status Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation More Likely
Acknowledgments
<a href="https://x.com/hareh4ru">Kyeongmin Kim (@hareh4ru)</a> with <a href="https://kaist-hacking.github.io/">KAIST Hacking Lab</a>

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            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "environmentalsScore": 0.0,
            "exploitCodeMaturity": "UNPROVEN",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "remediationLevel": "OFFICIAL_FIX",
            "reportConfidence": "CONFIRMED",
            "scope": "UNCHANGED",
            "temporalScore": 7.7,
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
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      "threats": [
        {
          "category": "impact",
          "details": "Remote Code Execution"
        },
        {
          "category": "exploit_status",
          "details": "Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation More Likely"
        }
      ],
      "title": "Remote Desktop Client 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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