What happened
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Server Update Service allows an authorized attacker to elevate privileges locally.
Affected versions
Windows 10 Version 1607: 10.0.14393.0 through before 10.0.14393.9060 (custom); 10.0.17763.0 through before 10.0.17763.8644 (custom); 10.0.19044.0 through before 10.0.19044.7184 (custom); 10.0.19045.0 through before 10.0.19045.7184 (custom); 10.0.22631.0 through before 10.0.22631.6936 (custom); 10.0.26100.0 through before 10.0.26100.8246 (custom); 10.0.26200.0 through before 10.0.26200.8246 (custom); 10.0.28000.0 through before 10.0.28000.1836 (custom); 6.2.9200.0 through before 6.2.9200.26026 (custom); 6.3.9600.0 through before 6.3.9600.23132 (custom); 10.0.20348.0 through before 10.0.20348.5020 (custom); 10.0.25398.0 through before 10.0.25398.2274 (custom); 10.0.26100.0 through before 10.0.26100.32690 (custom) Fixed: See vendor advisory.
Why it matters
Review the vendor advisory and exposure of the affected product to determine operational impact.
Detection & mitigation
- Apply vendor-provided updates or mitigations.
- Review affected product exposure and access logs.
Public PoC references
No public PoC reference has passed the current publication threshold.