Microsoft Patches Zero-Day Flaws That Let Hackers In With a Single Click

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Microsoft Patches Zero-Day Flaws That Let Hackers In With a Single Click

Technology • February 12, 2026

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Microsoft patches critical zero - day vulnerabilities in Windows and Office already exploited by hackers through one-click attacks, ...

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This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Vulnerability in Notepad's Markdown Feature Allows Remote Code Execution Researchers have discovered a vulnerability in Notepad's newly added Markdown support that can be exploited for remote code execution (RCE). This flaw, tracked as CVE-2026-20841 with a severity score of 8.8, was addressed in Microsoft's latest Patch Tuesday updates. The exploitation requires social engineering tactics, making it less severe than other vulnerabilities. 73 sources 56

Extracted Entities

Attack Types (1)

Zero-day Exploit

Platforms (2)