MSRC_CVE-2026-21234
Vulnerability from csaf_microsoft - Published: 2026-02-10 08:00 - Updated: 2026-02-10 08:00Summary
Windows Connected Devices Platform Service Elevation of Privilege 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-362
- Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Affected products
Fixed
23 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
|
Windows 10 Version 1809 for 32-bit Systems 10.0.17763.8389
Windows 10 Version 1809 for 32-bit Systems
|
10.0.17763.8389 | ||
|
Windows 10 Version 1809 for x64-based Systems 10.0.17763.8389
Windows 10 Version 1809 for x64-based Systems
|
10.0.17763.8389 | ||
|
Windows Server 2019 10.0.17763.8389
Windows Server 2019
|
10.0.17763.8389 | ||
|
Windows Server 2019 (Server Core installation) 10.0.17763.8389
Windows Server 2019 (Server Core installation)
|
10.0.17763.8389 | ||
|
Windows Server 2022 10.0.20348.4773
Windows Server 2022
|
10.0.20348.4773 | ||
|
Windows Server 2022 (Server Core installation) 10.0.20348.4773
Windows Server 2022 (Server Core installation)
|
10.0.20348.4773 | ||
|
Windows 10 Version 21H2 for 32-bit Systems 10.0.19044.6937
Windows 10 Version 21H2 for 32-bit Systems
|
10.0.19044.6937 | ||
|
Windows 10 Version 21H2 for ARM64-based Systems 10.0.19044.6937
Windows 10 Version 21H2 for ARM64-based Systems
|
10.0.19044.6937 | ||
|
Windows 10 Version 21H2 for x64-based Systems 10.0.19044.6937
Windows 10 Version 21H2 for x64-based Systems
|
10.0.19044.6937 | ||
|
Windows 10 Version 22H2 for x64-based Systems 10.0.19045.6937
Windows 10 Version 22H2 for x64-based Systems
|
10.0.19045.6937 | ||
|
Windows 10 Version 22H2 for ARM64-based Systems 10.0.19045.6937
Windows 10 Version 22H2 for ARM64-based Systems
|
10.0.19045.6937 | ||
|
Windows 10 Version 22H2 for 32-bit Systems 10.0.19045.6937
Windows 10 Version 22H2 for 32-bit Systems
|
10.0.19045.6937 | ||
|
Windows 11 Version 23H2 for ARM64-based Systems 10.0.22631.6649
Windows 11 Version 23H2 for ARM64-based Systems
|
10.0.22631.6649 | ||
|
Windows 11 Version 23H2 for x64-based Systems 10.0.22631.6649
Windows 11 Version 23H2 for x64-based Systems
|
10.0.22631.6649 | ||
|
Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.2149
Windows Server 2022, 23H2 Edition (Server Core installation)
|
10.0.25398.2149 | ||
|
Windows 11 Version 24H2 for ARM64-based Systems 10.0.26100.7840
Windows 11 Version 24H2 for ARM64-based Systems
|
10.0.26100.7840 | ||
|
Windows 11 Version 24H2 for x64-based Systems 10.0.26100.7840
Windows 11 Version 24H2 for x64-based Systems
|
10.0.26100.7840 | ||
|
Windows Server 2025 10.0.26100.32370
Windows Server 2025
|
10.0.26100.32370 | ||
|
Windows Server 2025 (Server Core installation) 10.0.26100.32370
Windows Server 2025 (Server Core installation)
|
10.0.26100.32370 | ||
|
Windows 11 Version 25H2 for ARM64-based Systems 10.0.26200.7840
Windows 11 Version 25H2 for ARM64-based Systems
|
10.0.26200.7840 | ||
|
Windows 11 Version 25H2 for x64-based Systems 10.0.26200.7840
Windows 11 Version 25H2 for x64-based Systems
|
10.0.26200.7840 | ||
|
Windows 11 version 26H1 for x64-based Systems 10.0.28000.1575
Windows 11 version 26H1 for x64-based Systems
|
10.0.28000.1575 | ||
|
Windows 11 Version 26H1 for ARM64-based Systems 10.0.28000.1575
Windows 11 Version 26H1 for ARM64-based Systems
|
10.0.28000.1575 |
Known affected
23 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
|
Windows 11 Version 26H1 for ARM64-based Systems <10.0.28000.1575
Windows 11 Version 26H1 for ARM64-based Systems
|
<10.0.28000.1575 |
Vendor Fix
fix
|
|
|
Windows 11 version 26H1 for x64-based Systems <10.0.28000.1575
Windows 11 version 26H1 for x64-based Systems
|
<10.0.28000.1575 |
Vendor Fix
fix
|
|
|
Windows 11 Version 25H2 for x64-based Systems <10.0.26200.7840
Windows 11 Version 25H2 for x64-based Systems
|
<10.0.26200.7840 |
Vendor Fix
fix
Vendor Fix
fix
|
|
|
Windows 11 Version 25H2 for ARM64-based Systems <10.0.26200.7840
Windows 11 Version 25H2 for ARM64-based Systems
|
<10.0.26200.7840 |
Vendor Fix
fix
Vendor Fix
fix
|
|
|
Windows Server 2025 (Server Core installation) <10.0.26100.32370
Windows Server 2025 (Server Core installation)
|
<10.0.26100.32370 |
Vendor Fix
fix
Vendor Fix
fix
|
|
|
Windows Server 2025 <10.0.26100.32370
Windows Server 2025
|
<10.0.26100.32370 |
Vendor Fix
fix
Vendor Fix
fix
|
|
|
Windows 11 Version 24H2 for x64-based Systems <10.0.26100.7840
Windows 11 Version 24H2 for x64-based Systems
|
<10.0.26100.7840 |
Vendor Fix
fix
Vendor Fix
fix
|
|
|
Windows 11 Version 24H2 for ARM64-based Systems <10.0.26100.7840
Windows 11 Version 24H2 for ARM64-based Systems
|
<10.0.26100.7840 |
Vendor Fix
fix
Vendor Fix
fix
|
|
|
Windows Server 2022, 23H2 Edition (Server Core installation) <10.0.25398.2149
Windows Server 2022, 23H2 Edition (Server Core installation)
|
<10.0.25398.2149 |
Vendor Fix
fix
|
|
|
Windows 11 Version 23H2 for x64-based Systems <10.0.22631.6649
Windows 11 Version 23H2 for x64-based Systems
|
<10.0.22631.6649 |
Vendor Fix
fix
|
|
|
Windows 11 Version 23H2 for ARM64-based Systems <10.0.22631.6649
Windows 11 Version 23H2 for ARM64-based Systems
|
<10.0.22631.6649 |
Vendor Fix
fix
|
|
|
Windows 10 Version 22H2 for 32-bit Systems <10.0.19045.6937
Windows 10 Version 22H2 for 32-bit Systems
|
<10.0.19045.6937 |
Vendor Fix
fix
|
|
|
Windows 10 Version 22H2 for ARM64-based Systems <10.0.19045.6937
Windows 10 Version 22H2 for ARM64-based Systems
|
<10.0.19045.6937 |
Vendor Fix
fix
|
|
|
Windows 10 Version 22H2 for x64-based Systems <10.0.19045.6937
Windows 10 Version 22H2 for x64-based Systems
|
<10.0.19045.6937 |
Vendor Fix
fix
|
|
|
Windows 10 Version 21H2 for x64-based Systems <10.0.19044.6937
Windows 10 Version 21H2 for x64-based Systems
|
<10.0.19044.6937 |
Vendor Fix
fix
|
|
|
Windows 10 Version 21H2 for ARM64-based Systems <10.0.19044.6937
Windows 10 Version 21H2 for ARM64-based Systems
|
<10.0.19044.6937 |
Vendor Fix
fix
|
|
|
Windows 10 Version 21H2 for 32-bit Systems <10.0.19044.6937
Windows 10 Version 21H2 for 32-bit Systems
|
<10.0.19044.6937 |
Vendor Fix
fix
|
|
|
Windows Server 2022 (Server Core installation) <10.0.20348.4773
Windows Server 2022 (Server Core installation)
|
<10.0.20348.4773 |
Vendor Fix
fix
Vendor Fix
fix
|
|
|
Windows Server 2022 <10.0.20348.4773
Windows Server 2022
|
<10.0.20348.4773 |
Vendor Fix
fix
Vendor Fix
fix
|
|
|
Windows Server 2019 (Server Core installation) <10.0.17763.8389
Windows Server 2019 (Server Core installation)
|
<10.0.17763.8389 |
Vendor Fix
fix
|
|
|
Windows Server 2019 <10.0.17763.8389
Windows Server 2019
|
<10.0.17763.8389 |
Vendor Fix
fix
|
|
|
Windows 10 Version 1809 for x64-based Systems <10.0.17763.8389
Windows 10 Version 1809 for x64-based Systems
|
<10.0.17763.8389 |
Vendor Fix
fix
|
|
|
Windows 10 Version 1809 for 32-bit Systems <10.0.17763.8389
Windows 10 Version 1809 for 32-bit Systems
|
<10.0.17763.8389 |
Vendor Fix
fix
|
Threats
Impact
Elevation of Privilege
Exploit Status
Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Unlikely
References
Acknowledgments
<a href="https://twitter.com/hillstone_lab">Zhang WangJunJie, He YiSheng</a> with <a href="https://www.hillstonenet.com/">Hillstone Networks Security Research Institute</a>
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"name": "Concurrent Execution using Shared Resource with Improper Synchronization (\u0027Race Condition\u0027)"
},
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{
"category": "general",
"text": "Microsoft",
"title": "Assigning CNA"
},
{
"category": "faq",
"text": "Successful exploitation of this vulnerability requires an attacker to win a race condition.",
"title": "According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?"
},
{
"category": "faq",
"text": "An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.",
"title": "What privileges could be gained by an attacker who successfully exploited this vulnerability?"
}
],
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"11569",
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},
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"category": "self",
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},
{
"category": "self",
"summary": "CVE-2026-21234 Windows Connected Devices Platform Service Elevation of Privilege Vulnerability - CSAF",
"url": "https://msrc.microsoft.com/csaf/advisories/2026/msrc_cve-2026-21234.json"
}
],
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{
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"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"environmentalsScore": 0.0,
"exploitCodeMaturity": "UNPROVEN",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"remediationLevel": "OFFICIAL_FIX",
"reportConfidence": "CONFIRMED",
"scope": "UNCHANGED",
"temporalScore": 6.1,
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
"version": "3.1"
},
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"14",
"15",
"16",
"17",
"18",
"19",
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]
}
],
"threats": [
{
"category": "impact",
"details": "Elevation of Privilege"
},
{
"category": "exploit_status",
"details": "Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Unlikely"
}
],
"title": "Windows Connected Devices Platform Service Elevation of Privilege Vulnerability"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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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