CVE-2025-60724: Microsoft Office Buffer Overflow Flaw

CVE-2025-60724 Overview

A heap-based buffer overflow vulnerability has been identified in the Microsoft Graphics Component, a critical system component responsible for rendering graphical content across Windows operating systems and Microsoft Office products. This vulnerability allows an unauthorized attacker to execute arbitrary code remotely over a network without requiring any user interaction or prior authentication. The flaw stems from improper bounds checking when processing specially crafted graphical data, enabling attackers to corrupt heap memory and potentially gain full control of affected systems.

Critical Impact

This vulnerability enables unauthenticated remote code execution across a wide range of Microsoft Windows versions and Office products, potentially allowing complete system compromise without user interaction.

Affected Products

• Microsoft Office (Android) and Office Long Term Servicing Channel 2021/2024 (macOS)
• Microsoft Windows 10 versions 1607, 1809, 21H2, and 22H2 (x86 and x64)
• Microsoft Windows 11 versions 23H2, 24H2, and 25H2
• Microsoft Windows Server 2008 SP2 through Windows Server 2025
• Microsoft Windows Server 2012, 2016, 2019, 2022, and 2022 23H2

Discovery Timeline

• November 11, 2025 - CVE-2025-60724 published to NVD
• November 17, 2025 - Last updated in NVD database

Technical Details for CVE-2025-60724

Vulnerability Analysis

The vulnerability resides in the Microsoft Graphics Component, which handles the rendering and processing of various graphical formats across Windows and Office applications. A heap-based buffer overflow (CWE-122) occurs when the component fails to properly validate the size of input data before copying it to a heap-allocated buffer. This memory corruption vulnerability can be triggered remotely over a network, making it particularly dangerous for internet-facing systems and enterprise environments.

The attack does not require authentication, user privileges, or any form of user interaction, significantly lowering the barrier for exploitation. When successfully exploited, an attacker could achieve complete compromise of the target system, including the ability to read, modify, or delete sensitive data, install malicious software, or use the compromised system as a pivot point for further network intrusion.

Root Cause

The root cause is a heap-based buffer overflow (CWE-122) in the Microsoft Graphics Component. This occurs when the component allocates a fixed-size heap buffer but fails to properly validate the length of incoming graphical data before writing it to the buffer. When an attacker supplies data exceeding the allocated buffer size, the overflow corrupts adjacent heap memory structures, potentially overwriting critical data structures such as function pointers or object vtables.

Attack Vector

The vulnerability is exploitable remotely over a network without requiring authentication or user interaction. An attacker can craft malicious graphical content designed to trigger the buffer overflow when processed by the vulnerable component. Attack scenarios include:

• Hosting malicious graphical content on a web server and enticing users to visit the page
• Sending specially crafted documents via email that contain embedded malicious graphics
• Exploiting network services that process graphical data using the vulnerable component
• Targeting enterprise environments through document sharing platforms

The network-based attack vector combined with the lack of authentication requirements makes this vulnerability particularly attractive for threat actors targeting both individual users and organizations.

Detection Methods for CVE-2025-60724

Indicators of Compromise

• Unexpected crashes or instability in applications that process graphics, including Windows Explorer, Office applications, or web browsers
• Anomalous heap allocation patterns or memory corruption artifacts in crash dumps from graphical processing components
• Suspicious network traffic containing malformed graphical data targeting Windows systems
• Evidence of code execution from unexpected memory regions following graphics processing operations

Detection Strategies

• Deploy endpoint detection and response (EDR) solutions to monitor for suspicious process behavior following graphics rendering activities
• Enable Windows Defender Exploit Guard features including Heap Spray protection and Control Flow Guard
• Implement network intrusion detection systems (IDS) with signatures for known heap overflow exploitation patterns
• Monitor for unusual child process creation from graphics processing components or Office applications

Monitoring Recommendations

• Enable detailed Windows Event Logging for Application Crash events (Event ID 1000) with correlation to graphics-related processes
• Monitor for anomalous memory allocation patterns using Windows Performance Monitor or similar tools
• Implement file integrity monitoring for Microsoft Graphics Component DLLs and related system files
• Review security logs for failed exploitation attempts that may manifest as repeated application crashes

How to Mitigate CVE-2025-60724

Immediate Actions Required

• Apply Microsoft security updates immediately via Windows Update, WSUS, or Microsoft Update Catalog
• Prioritize patching for internet-facing systems and high-value assets due to the network attack vector
• Implement network segmentation to limit potential lateral movement if exploitation occurs
• Review and restrict inbound network traffic that may deliver malicious graphical content

Patch Information

Microsoft has released a security update to address this vulnerability. Organizations should apply the patch immediately using their standard update mechanisms. For detailed patch information, see the Microsoft Security Response Center advisory.

The update addresses the root cause by implementing proper bounds checking before heap buffer operations in the Graphics Component.

Workarounds

• Enable Windows Defender Exploit Guard with Hardware-enforced Stack Protection where supported
• Consider blocking or inspecting untrusted graphical content at network boundaries until patches are applied
• Implement application whitelisting to prevent unauthorized code execution
• Deploy Enhanced Mitigation Experience Toolkit (EMET) configurations on legacy systems where applicable

# Enable Windows Defender Exploit Guard via PowerShell
Set-ProcessMitigation -System -Enable CFG,StrictCFG
Set-ProcessMitigation -System -Enable DEP,EmulateAtlThunks
Set-ProcessMitigation -System -Enable BottomUp,HighEntropy