Microsoft Patch Tuesday · December 2025

Heap-based buffer overflow in Windows Resilient File System (ReFS) allows an authorized attacker to execute code over a network.

Untrusted pointer dereference in Windows Routing and Remote Access Service (RRAS) allows an unauthorized attacker to execute code over a network.

Heap-based buffer overflow in Windows Routing and Remote Access Service (RRAS) allows an unauthorized attacker to execute code over a network.

Improper neutralization of special elements used in a command ('command injection') in Copilot allows an unauthorized attacker to execute code locally.

Publicly disclosed

Improper neutralization of special elements used in a command ('command injection') in Windows PowerShell allows an unauthorized attacker to execute code locally.

Publicly disclosed

Out-of-bounds read in Windows Projected File System allows an authorized attacker to elevate privileges locally.

Missing authentication for critical function in Windows Storage VSP Driver allows an authorized attacker to elevate privileges locally.

Improper access control in Windows Storage VSP Driver allows an authorized attacker to elevate privileges locally.

Heap-based buffer overflow in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.

Improper input validation in Windows Message Queuing allows an authorized attacker to elevate privileges locally.

Out-of-bounds read in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.

Heap-based buffer overflow in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.

Buffer over-read in Windows Projected File System Filter Driver allows an authorized attacker to elevate privileges locally.

Buffer over-read in Windows Projected File System allows an authorized attacker to elevate privileges locally.

Buffer over-read in Windows Projected File System allows an authorized attacker to elevate privileges locally.

Null pointer dereference in Windows Client-Side Caching (CSC) Service allows an authorized attacker to elevate privileges locally.

Integer overflow or wraparound in Windows Projected File System allows an authorized attacker to elevate privileges locally.

Heap-based buffer overflow in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.

Use of uninitialized resource in Windows Remote Access Connection Manager allows an authorized attacker to elevate privileges locally.

Improper access control in Windows Remote Access Connection Manager allows an authorized attacker to elevate privileges locally.

Relative path traversal in Microsoft Office Access allows an unauthorized attacker to execute code locally.

Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.

Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.

Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

Use after free in Microsoft Office Outlook allows an unauthorized attacker to execute code locally.

Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

Improper input validation in Windows Installer allows an authorized attacker to elevate privileges locally.

Out-of-bounds read in Application Information Services allows an authorized attacker to elevate privileges locally.

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Shell allows an authorized attacker to elevate privileges locally.

Improper access control in Windows Admin Center allows an authorized attacker to elevate privileges locally.

Improper access control in Storvsp.sys Driver allows an authorized attacker to elevate privileges locally.

Heap-based buffer overflow in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.

Heap-based buffer overflow in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Shell allows an authorized attacker to elevate privileges locally.

Use after free in Windows Shell allows an authorized attacker to elevate privileges locally.

Improper access control in Windows Camera Frame Server Monitor allows an authorized attacker to disclose information locally.

Concurrent execution using shared resource with improper synchronization ('race condition') in Microsoft Brokering File System allows an authorized attacker to elevate privileges locally.

Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.

Use after free in Microsoft Brokering File System allows an authorized attacker to elevate privileges locally.

Use after free in Windows DirectX allows an authorized attacker to elevate privileges locally.

Null pointer dereference in Windows DirectX allows an authorized attacker to deny service locally.

Null pointer dereference in Windows DirectX allows an authorized attacker to deny service locally.

Buffer over-read in Windows Routing and Remote Access Service (RRAS) allows an unauthorized attacker to disclose information over a network.

Exposure of sensitive information to an unauthorized actor in Microsoft Graphics Component allows an authorized attacker to disclose information over a network.

Out-of-bounds read in Windows Defender Firewall Service allows an authorized attacker to disclose information locally.

Integer underflow (wrap or wraparound) in Windows Hyper-V allows an authorized attacker to deny service over a network.

Access of resource using incompatible type ('type confusion') in Microsoft Office allows an unauthorized attacker to execute code locally.

Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.

Improper input validation in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.

User interface (ui) misrepresentation of critical information in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.

Out-of-bounds write in Azure Monitor Agent allows an authorized attacker to execute code over a network.