Security News > 2021 > January > January 2021 Patch Tuesday: Microsoft plugs Defender zero-day RCE

Microsoft has plugged 83 CVEs, including a Microsoft Defender zero-day.

One of the latter - a zero-day RCE affecting Microsoft Defender antivirus - is being exploited in the wild, but Microsoft didn't reveal more about these attacks.

"This bug in the Microsoft Malware Protection Engine may already be patched on your system as the engine auto-updates as needed. However, if your systems are not connected to the Internet, you'll need to manually apply the patch," Trend Micro Zero Day Initiative's Dustin Childs commented.

Among the critical flaws fixed on this January 2021 Patch Tuesday by Microsoft are five Remote Procedure Call runtime RCEs.

The rest of the patched flaws affect a wide variety of Microsoft solutions, including the Bot Framework SDK, Hyper-V, Microsoft Office, SharePoint, Windows Bluetooth, Windows CSC Service, and so on.

For January 2021 Patch Tuesday, SAP has released 10 new security notes and updated 7 previously released ones.

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