Windows Connected Devices Platform Service
CVE-2026-21234 — Windows Connected Devices Platform Service Elevation of Privilege Vulnerability
Executive Summary
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Connected Devices Platform Service allows an authorized attacker to elevate privileges locally.
Overview
7
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
Exploitation Unlikely
MS Exploit Likelihood
CVSS Vector
ATTACK VECTOR
Local
ATTACK COMPLEXITY
High
PRIVILEGES REQUIRED
Low
USER INTERACTION
None
SCOPE
Unchanged
Temporal Score: 6.1
EPSS Score
0.00261
probability of exploitation in the next 30 days
0.17207 percentile - updated 2026-06-20
View on FIRST.org
Affected Products
23 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Windows 10 Version 1809 for 32-bit Systems | 5075904 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 1809 for x64-based Systems | 5075904 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 21H2 for 32-bit Systems | 5075912 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 21H2 for ARM64-based Systems | 5075912 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 21H2 for x64-based Systems | 5075912 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 22H2 for 32-bit Systems | 5075912 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 22H2 for ARM64-based Systems | 5075912 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 22H2 for x64-based Systems | 5075912 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 11 Version 23H2 for ARM64-based Systems | 5075941 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 11 Version 23H2 for x64-based Systems | 5075941 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 11 Version 24H2 for ARM64-based Systems | 5077181 (Security Update) 5077212 (Security Hotpatch Update) |
Important | Elevation of Privilege | Yes |
| Windows 11 Version 24H2 for x64-based Systems | 5077212 (Security Hotpatch Update) 5077181 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 11 Version 25H2 for ARM64-based Systems | 5077181 (Security Update) 5077212 (Security Hotpatch Update) |
Important | Elevation of Privilege | Yes |
| Windows 11 Version 25H2 for x64-based Systems | 5077181 (Security Update) 5077212 (Security Hotpatch Update) |
Important | Elevation of Privilege | Yes |
| Windows 11 Version 26H1 for ARM64-based Systems | 5077179 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 11 version 26H1 for x64-based Systems | 5077179 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows Server 2019 | 5075904 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows Server 2019 (Server Core installation) | 5075904 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows Server 2022 | 5075906 (Security Update) 5075943 (Security Hotpatch Update) |
Important | Elevation of Privilege | Yes |
| Windows Server 2022 (Server Core installation) | 5075906 (Security Update) 5075943 (Security Hotpatch Update) |
Important | Elevation of Privilege | Yes |
| Windows Server 2022, 23H2 Edition (Server Core installation) | 5075897 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows Server 2025 | 5075899 (Security Update) 5075942 (Security Hotpatch Update) |
Important | Elevation of Privilege | Yes |
| Windows Server 2025 (Server Core installation) | 5075899 (Security Update) 5075942 (Security Hotpatch Update) |
Important | Elevation of Privilege | Yes |
Patches
9 patches
| Article | Type | Restart |
|---|---|---|
5075904 |
Security Update | Yes |
5075912 |
Security Update | Yes |
5075941 |
Security Update | Yes |
5077181 (Security Update) 5077212 |
Security Update | Yes |
5077212 (Security Hotpatch Update) 5077181 |
Security Hotpatch Update | Yes |
5077179 |
Security Update | Yes |
5075906 (Security Update) 5075943 |
Security Update | Yes |
5075897 |
Security Update | Yes |
5075899 (Security Update) 5075942 |
Security Update | Yes |
Known Exploits
No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.
Acknowledgments
Zhang WangJunJie, He YiSheng with Hillstone Networks Security Research Institute
References
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