Microsoft 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 enables a local attacker who already possesses low-level privileges on a system to escalate those permissions. If successfully exploited, the attacker could obtain SYSTEM-level access, providing full control over the affected host.

Exposure and applicability

This vulnerability affects systems running the Microsoft Windows Kernel. The primary exposure path is local; an attacker must already have a foothold on the target machine to trigger the race condition. Because this involves kernel-level privilege escalation, it is particularly critical for multi-user environments or systems where low-privileged service accounts are active.

Remediation priorities

Based on our analysis, vulnerability management teams should prioritize remediation based on the following hierarchy:

1. Vendor Mitigations: The primary corrective action is to apply the specific mitigations provided by Microsoft.
2. Cloud Service Alignment: For organizations utilizing cloud services, alignment with BOD 22-01 guidance is recommended to ensure provider-side exposures are addressed.
3. Product Decommissioning: In scenarios where vendor mitigations cannot be applied or are unavailable for a specific legacy build, the source suggests discontinuing use of the product.

For federal agencies, CISA has established a remediation deadline of December 3, 2025. While this date is not a legal requirement for private sector organizations, it serves as a technical benchmark for the urgency of the fix.

How to validate remediation

Verification must move beyond simple version checks. Because race conditions can be influenced by specific system configurations and timing, defenders should focus on the following validation methods:

• Mitigation Confirmation: Verify that the specific security updates or configuration changes mandated by Microsoft are active across all targeted endpoints.
• Configuration Audit: Ensure that any compensating controls intended to limit local privilege escalation (such as restricted user permissions) are functioning as intended, though these do not fix the underlying kernel flaw.

Confirmation of a patch installation indicates the update was deployed, but it does not inherently prove the race condition is unreachable in every unique environment.

Limits and open questions

There are several unknowns regarding this vulnerability. The current status of known ransomware campaign use is listed as “Unknown,” meaning there is no confirmed evidence provided in the source that this specific CVE is being leveraged by such groups, nor is there evidence to rule it out. Additionally, the exact technical trigger for the race condition within the kernel remains unspecified in the high-level advisory, which limits the ability to develop custom detection signatures without further vendor documentation.

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 29, 2026 at 00:21 UTC.

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