March 2025 Patch Tuesday: Critical Updates and 7 Zero-Day Fixes

March 2025 Patch Tuesday: Overview of Vulnerabilities

Microsoft's March 2025 Patch Tuesday has addressed a total of 57 vulnerabilities, including six critical zero-day flaws that are actively exploited. The vulnerabilities have been categorized with 23 related to remote code execution, indicating a significant risk to systems.

Image courtesy of BleepingComputer

For a detailed list of these vulnerabilities and their implications, refer to the official Microsoft release notes.

Actively Exploited Zero-Days

The six zero-day vulnerabilities addressed in the patch include:

1. CVE-2025-24983: A Windows Win32 Kernel Subsystem elevation of privilege vulnerability that allows local attackers to gain SYSTEM privileges.
2. CVE-2025-24984: An information disclosure vulnerability in Windows NTFS that can be exploited by attackers with physical access to the device.
3. CVE-2025-24985: A remote code execution vulnerability in the Windows Fast FAT File System Driver resulting from an integer overflow.
4. CVE-2025-24991: An information disclosure vulnerability in Windows NTFS that allows attackers to read small portions of heap memory.
5. CVE-2025-24993: A heap-based buffer overflow in Windows NTFS that allows for remote code execution.
6. CVE-2025-26633: A security feature bypass vulnerability in Microsoft Management Console that may allow malicious files to execute code.

Microsoft has provided additional information on these vulnerabilities in their security guidance.

Recent Updates from Other Vendors

In addition to Microsoft, various vendors have released updates this month:

• Broadcom fixed three zero-day flaws in VMware ESXi, which were exploited in attacks. Details can be found in this BleepingComputer report.
• Cisco has addressed a WebEx flaw that could expose credentials; more information is available in this Cisco advisory.
• Google patched an exploited zero-day flaw in an Android Linux kernel driver, as noted in this BleepingComputer article.

Security Fixes and Known Issues

While addressing these vulnerabilities, Microsoft has also noted some known issues:

• Windows 11 users may encounter random print outputs from USB-connected dual-mode printers after the March update. This issue can be mitigated with a Known Issue Rollback.
• Windows 10 users might see errors related to the System Guard Runtime Monitor Broker Service after applying updates.

For further details on these known issues, check the Microsoft support pages on USB printers and Event Viewer errors.

Importance of Cybersecurity Monitoring

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Summary of Resolved Vulnerabilities

The complete list of resolved vulnerabilities from the March 2025 Patch Tuesday can be found in the full report here. Key vulnerabilities include:

• Multiple remote code execution vulnerabilities across various Microsoft Office applications.
• Elevation of privilege vulnerabilities involving the Windows kernel and various services.

For a comprehensive understanding of each CVE and its impact, refer to Microsoft’s update guide.

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