Microsoft Addresses Windows Kernel Zero-Day Vulnerability in November Patch

Microsoft November 2025 Patch Tuesday: Zero-Day Exploitation and Critical Vulnerabilities

Microsoft has released its November 2025 security updates, addressing a total of 63 newly disclosed vulnerabilities. This includes a zero-day vulnerability actively exploited in the wild. Microsoft's November 2025 security update addresses these issues.

CVE-2025-62215: Windows Kernel Elevation of Privilege Vulnerability

CVE-2025-62215 is a privilege escalation vulnerability within the Windows Kernel. With a CVSS score of 7.0, successful exploitation allows an authenticated attacker to gain SYSTEM privileges. The vulnerability stems from a race condition. CISA has added it to its Known Exploited Vulnerabilities Catalog, urging immediate patching.

Security researchers describe the exploit as manipulating system memory via a race condition. An attacker with low-level local access can run a crafted program to trigger a timing error. This leads to a "double free" condition, corrupting the kernel heap and allowing memory overwrites. More details on the vulnerability are available.

Ivanti experts noted that CVE-2025-62215 affects all supported Windows OS editions and Windows 10 Extended Security Updates (ESU). Microsoft released an out-of-band update to address enrollment issues in the ESU program.

Additional Critical Vulnerabilities

The November 2025 Patch Tuesday addressed five critical vulnerabilities:

• CVE-2025-60724: GDI+ Remote Code Execution Vulnerability: A heap-based buffer overflow in the Microsoft Graphics Component may allow remote code execution. An attacker could exploit this by convincing a user to open a specially crafted metafile.
• CVE-2025-62199: Microsoft Office Remote Code Execution Vulnerability: A use-after-free vulnerability in Microsoft Office may allow local code execution if a user opens a malicious file.
• CVE-2025-60716: DirectX Graphics Kernel Elevation of Privilege Vulnerability: A use-after-free in Windows DirectX may allow privilege elevation. Successful exploitation requires winning a race condition to gain SYSTEM privileges.
• CVE-2025-62214: Visual Studio Remote Code Execution Vulnerability: A command injection vulnerability in Visual Studio may allow local code execution.
• CVE-2025-30398: Nuance PowerScribe 360 Information Disclosure Vulnerability: Missing authorization in Nuance PowerScribe may allow information disclosure over a network via a specific API call.

Other Vulnerabilities of Note

Several other elevation of privilege vulnerabilities were addressed:

• CVE-2025-59512: Customer Experience Improvement Program (CEIP) vulnerability.
• CVE-2025-60705: Windows Client-Side Caching vulnerability.
• CVE-2025-60719, CVE-2025-62217, and CVE-2025-62213: Windows Ancillary Function Driver for WinSock vulnerabilities.

Qualys Recommendations

Qualys recommends using Vulnerability Management, Detection & Response (VMDR) to detect and prioritize vulnerabilities. A Qualys QQL query can identify impacted hosts.

Qualys TruRisk™ Eliminate can rapidly remediate Windows hosts. Missing patches can be identified and deployed with one click.

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