【Vulnerability Alert】Microsoft Releases Security Updates for October 2026

publish date : 2026-10-22 update date : 2026-10-22

Source: Ministry of education information & communication security contingency platform


Publication Number	TACERT-ANA-2026102209102828	Publication Time	2026-10-22 09:21:29
Incident Type	ANA-Vulnerability Alert	Discovery Time	2026-10-22 09:21:29
Impact Level	Medium
[Subject] 【Vulnerability Alert】Microsoft Releases Security Updates for October 2026
[Content] Forwarded from the National Institute of Cyber Security Cybersecurity Alert NISAC-200-202610-00000014 Microsoft has released its October 2026 security updates, addressing a total of 1,416 vulnerabilities, including 268 high-risk vulnerabilities and one vulnerability that has been exploited. Please verify and apply the necessary security patches as soon as possible. Information Sharing Level: WHITE (Information content can be publicly disclosed)
[Affected Platform] .NET .NET and Visual Studio .NET FrameworkActive Directory Domain Services
[Recommended Actions] Microsoft has officially released fixes for these vulnerabilities. Agencies may contact their system maintenance vendors or refer to the following link: https://msrc.microsoft.com/update-guide/releaseNote/2026-Oct
[Reference] 1. https://msrc.microsoft.com/update-guide/releaseNote/2026-Oct

(This notification is for informational purposes only and does not constitute a cybersecurity incident).
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