High · published January 13, 2026
⚡ A race condition in Windows Management Services could let an authorized attacker elevate privileges locally — a stealthy sprint to the top! 🏃♂️💨 Think of this vulnerability like a busy restaurant where the kitchen accepts orders from multiple waitstaff without checking their notes. If one server slips in a VIP request while another is still processing, the kitchen might mistakenly prioritize that order, giving access to the most exclusive dishes — or in this case, system privileges. An attacker could exploit this flaw to gain elevated permissions, effectively becoming a superuser on the system. This could lead to unauthorized access to sensitive data, installation of malicious software, or even complete control over the targeted system. The potential for chaos is absolutely staggering!
Think of this vulnerability like a busy restaurant where the kitchen accepts orders from multiple waitstaff without checking their notes. If one server slips in a VIP request while another is still processing, the kitchen might mistakenly prioritize that order, giving access to the most exclusive dishes — or in this case, system privileges. This vulnerability arises from improper synchronization of shared resources during concurrent executions in Windows Management Services, allowing an attacker with valid credentials to escalate their privileges unexpectedly.
An attacker could exploit this flaw to gain elevated permissions, effectively becoming a superuser on the system. This could lead to unauthorized access to sensitive data, installation of malicious software, or even complete control over the targeted system. The potential for chaos is absolutely staggering! First and foremost, ensure your systems are updated with the latest patches provided by Microsoft that specifically address CVE-2026-20918. Additionally, review access controls and user privileges to minimize potential misuse. Regular audits can help spot any unauthorized changes or access. You've got this! By implementing these changes, you'll be well on your way to securing your environment. 🛡️
| Product | Versions | Fixed in |
|---|---|---|
| microsoft/windows_10_1809 | < 10.0.17763.8276 | 10.0.17763.8276 |
| microsoft/windows_10_1809 | < 10.0.17763.8276 | 10.0.17763.8276 |
| microsoft/windows_10_21h2 | < 10.0.19044.6809 | 10.0.19044.6809 |
| microsoft/windows_10_22h2 | < 10.0.19045.6809 | 10.0.19045.6809 |
| microsoft/windows_11_23h2 | < 10.0.22631.6491 | 10.0.22631.6491 |
| microsoft/windows_11_24h2 | < 10.0.26100.7623 | 10.0.26100.7623 |
| microsoft/windows_11_25h2 | < 10.0.26200.7623 | 10.0.26200.7623 |
| microsoft/windows_server_2019 | < 10.0.17763.8276 | 10.0.17763.8276 |
| microsoft/windows_server_2022 | < 10.0.20348.4648 | 10.0.20348.4648 |
| microsoft/windows_server_2022_23h2 | < 10.0.25398.2092 | 10.0.25398.2092 |
| microsoft/windows_server_2025 | < 10.0.26100.32230 | 10.0.26100.32230 |