JPCERT-AT-2026-0012
JPCERT/CC
2026-05-13

I. Overview

Microsoft has released May 2026 Security Updates to address the vulnerabilities in their products. Remote attackers leveraging these vulnerabilities may be able to execute arbitrary code. Please consider applying the security update programs by referring to the information provided by Microsoft.


Microsoft Corporation
May 2026 Security Updates
https://msrc.microsoft.com/update-guide/en-us/releaseNote/2026-May

II. Solution

Please apply the security update programs through Microsoft Update, Windows Update, etc.

Microsoft Update Catalog
https://www.catalog.update.microsoft.com/

Windows Update: FAQ
https://support.microsoft.com/en-us/help/12373/windows-update-faq

III. References

Microsoft Corporation
Release Notes
https://msrc.microsoft.com/update-guide/

If you have any information regarding this alert, please contact JPCERT/CC.

JPCERT Coordination Center (Cyber Security Coordination Group)
MAIL: ew-info@jpcert.or.jp
https://www.jpcert.or.jp/english/