Security Alert: Microsoft Releases May 2026 Security Updates

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/