CVE-2026-70582 in Windows
Summary
by MITRE • 09/09/2026
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management Instrumentation allows an authorized attacker to elevate privileges locally.
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Analysis
by VulDB Data Team • 09/09/2026
The vulnerability identified involves a race condition within the Windows Management Instrumentation (WMI) service, specifically arising from concurrent execution paths that interact with shared resources without proper synchronization mechanisms. This flaw represents a classic instance of CWE-362, which categorizes issues related to concurrent execution using shared resource with improper synchronization. In this context, WMI serves as a critical infrastructure component in Windows operating systems, providing a standardized interface for accessing management information and events on managed components such as devices, services, and software applications. When multiple threads or processes attempt to access or modify these shared resources simultaneously, the lack of atomic operations or mutex locks allows an attacker to exploit timing windows where the state of the resource is inconsistent or partially updated.
An authorized local attacker can leverage this race condition to escalate privileges from a standard user account to higher levels, such as SYSTEM or Administrator rights. The operational impact stems from the ability to manipulate internal data structures within WMI during these unsynchronized access intervals. By carefully crafting requests that trigger specific timing conditions, an attacker can bypass security checks or overwrite critical pointers and flags that govern privilege boundaries. This effectively allows the execution of arbitrary code with elevated privileges, compromising the integrity and confidentiality of the system. The attack does not require remote network access but relies on local authentication, meaning any user account with valid credentials on the target machine poses a potential threat vector if they can execute malicious scripts or applications that interact with WMI in this specific manner.
From a defensive perspective, mitigating this vulnerability requires addressing both the underlying code flaw and the broader security posture of the system. Microsoft has released patches to correct the synchronization logic within the affected versions of Windows Management Instrumentation, ensuring that shared resources are accessed atomically or protected by appropriate locking mechanisms. Organizations must prioritize applying these updates across all endpoints to eliminate the race condition at its source. Additionally, implementing strict least-privilege principles can reduce the impact if exploitation occurs; by restricting user permissions and limiting access to sensitive WMI namespaces, the potential for privilege escalation is significantly diminished. Monitoring for unusual patterns in WMI activity, such as rapid successive queries or modifications from non-standard processes, may also aid in detecting attempted exploits of this flaw before successful compromise takes place.
This vulnerability aligns with MITRE ATT&CK technique T1068, which covers Exploitation for Privilege Escalation, specifically highlighting how attackers exploit software vulnerabilities to gain higher-level access on a compromised host. The specific mechanism falls under the sub-technique of exploiting race conditions or timing attacks within system services. Understanding this context is crucial for security teams conducting threat modeling and incident response planning. By recognizing that WMI is a high-value target due to its pervasive role in Windows administration, defenders can focus hardening efforts on securing these interfaces against local privilege escalation attempts. Regular auditing of user permissions and continuous monitoring of system integrity provide essential layers of defense complementing the technical patch provided by the vendor.