Microsoft plans to release a security patch on Tuesday that repairs five vulnerabilities in Windows and one in Office.
The security rating for the most serious Windows flaw is 'critical' and the Office patch has a security rating of 'moderate', Microsoft said in a security bulletin on its website.
The update will include a fix for the 'CreateTextRange' vulnerability that attackers started exploiting last month.
The update will disable all ActiveX elements on a webpage until users click on the page or press the tab and enter keys.
Enterprises can delay the patch for up to two months while they test applications for potential compatibility issues, Microsoft has previously said.
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PUBG news and updates: November's Update #23 to bring new Skorpion pistol and changes to blue zone visibility
Genuinely useful side-arm coming to PUBG in Update #23