Windows Kernel Privilege Escalation CVE-2025-62215

Historical catalog analysis: CISA added this entry on November 12, 2025. The entry reflects catalog information retrieved on August 31, 2026, not a snapshot archived on the inclusion date. Check current vendor guidance before acting.

What the vulnerability is

CVE-2025-62215 is a race condition vulnerability (CWE-362) located within the Microsoft Windows Kernel. This flaw allows an attacker who already possesses low-level local privileges on a system to escalate those permissions. If successfully exploited, the attacker could gain SYSTEM-level access, the highest level of privilege available on the Windows operating system.

Exposure and applicability

This vulnerability applies to environments running affected versions of Microsoft Windows. In healthcare settings, this is particularly relevant for workstations used by clinical staff, servers hosting electronic Protected Health Information (ePHI), and administrative systems.

Because this is a local privilege escalation vulnerability, the attacker must already have some form of access to the machine. However, once initial access is achieved—whether through compromised low-privileged credentials or other means—this flaw could be used to bypass security boundaries that normally protect sensitive system files and patient data from unauthorized modification or extraction.

Remediation priorities

Our analysis suggests that healthcare organizations should prioritize remediation based on the criticality of the asset. Systems that store ePHI or manage clinical workflows are high-priority targets for privilege escalation.

1. Patch Deployment: The primary remediation is to apply the security updates provided by Microsoft. Organizations should follow vendor instructions to ensure the kernel is updated to a version where this race condition is addressed.
2. Principle of Least Privilege (PoLP): While patching addresses the flaw, reducing the number of users with local access and auditing existing low-privileged accounts can limit the pool of potential entry points for local escalation.
3. Endpoint Hardening: Reviewing local security policies to restrict the ability of low-privileged users to execute unauthorized binaries may reduce the likelihood of an exploit being successfully launched on a system.

How to validate remediation

To verify that the risk has been reduced, security leaders and IT teams should employ the following methods:

• Version Verification: Confirm through centralized patch management systems or registry checks that the specific Microsoft update addressing CVE-2025-62215 has been successfully installed across all targeted endpoints.
• Configuration Audit: Review system logs for unauthorized attempts to execute privileged commands, which can help identify if existing low-privileged accounts are being misused, though this does not prove the vulnerability is gone.

Limits and open questions

It is important to note that while patching reduces the likelihood of exploitation, it does not eliminate all risks associated with local access. The source indicates that known use by ransomware campaigns is currently unknown; however, privilege escalation is a common step in such attacks.

Furthermore, organizations should be aware that applying kernel-level updates may require system restarts, which must be coordinated with clinical engineering and operational leads to ensure there is no disruption to patient care or medical device functionality.

Source and editorial note

CVE-2025-62215: Microsoft Windows Race Condition Vulnerability · Source date: November 12, 2025 · Retrieved August 31, 2026.

Material facts are tied to the cited primary source. Recommendations are independent defensive analysis unless attributed to the source. Confirm consequential decisions against current authoritative guidance.

Archive date: November 15, 2025. The displayed post date is assigned three days after the source date to organize this retrospective archive; it does not mean this site published the analysis then. First published by this site: September 26, 2026 at 02:58 UTC.

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