Microsoft’s April Security Update of High-Risk Vulnerability Notice for Multiple Products

A remote code execution vulnerability exists in Windows Active Directory. Due to improper input validation in Windows Active Directory, an authenticated attacker can send a specially crafted RPC call to the RPC host through an adjacent network to achieve remote code execution. CVSS score 8.0.

Official announcement link: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33826

Scope of Impact

The following are the affected product versions of some key vulnerabilities. For the scope of products affected by other vulnerabilities, please refer to the official announcement link.

Mitigation

At present, Microsoft has officially released security patches to fix the above vulnerabilities for supported product versions. It is strongly recommended that affected users install patches as soon as possible for protection. The official download link: https://msrc.microsoft.com/update-guide/releaseNote/2026-Apr

Note: Patch updates for Windows Update may fail due to network problems, computer environment problems, etc. After installing the patch, users should check whether the patch has been successfully updated in time.

Right-click the Windows icon, select “Settings (N)”, select “Update and Security”-“Windows Update”, view the prompt information on this page, or click “View Update History” to view the historical update status.

For updates that have not been successfully installed, you can click the update name to jump to the Microsoft official download page. It is recommended that users click the link on this page and go to the “Microsoft Update Catalog” website to download the independent program package and install it.

Appendix: Vulnerability List

Statement

This advisory is only used to describe a potential risk. NSFOCUS does not provide any commitment or promise on this advisory. NSFOCUS and the author will not bear any liability for any direct and/or indirect consequences and losses caused by transmitting and/or using this advisory. NSFOCUS reserves all the rights to modify and interpret this advisory. Please include this statement paragraph when reproducing or transferring this advisory. Do not modify this advisory, add/delete any information to/from it, or use this advisory for commercial purposes without permission from NSFOCUS.

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*** This is a Security Bloggers Network syndicated blog from NSFOCUS authored by NSFOCUS. Read the original post at: https://nsfocusglobal.com/microsofts-april-security-update-of-high-risk-vulnerability-notice-for-multiple-products/