Microsoft Addresses Windows Kernel Zero-Day Vulnerability in November Patch
TL;DR
- Microsoft's November 2025 Patch Tuesday addresses 63 vulnerabilities, highlighted by an actively exploited zero-day in the Windows Kernel (CVE-2025-62215) allowing privilege escalation. Critical fixes are also available for GDI+, Office, DirectX, and Visual Studio. Prompt patching is vital to protect against these urgent threats and prevent system compromise.
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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