Hours after Microsoft revealed hacking groups affiliated with the Chinese government have been exploiting a flaw in its SharePoint software, Bloomberg News reports that the National Nuclear Security Administration has also been breached in the attacks.

Closing the gaps is not enough against the current toolshell attacks. After all, attackers could already be inside. We show you how to detect them.

Microsoft confirmed “active” cyberattacks exploiting vulnerabilities in on-premises SharePoint Servers and released emergency patches for several versions of the systems.

Microsoft 365 Defender now can automatically detect and disrupt "adversary-in-the-middle" (AiTM) attacks, Microsoft announced on Wednesday.. Such attacks might entail a phishing attempt that ...

Microsoft Defender 365 will fight attackers with their own tactics by locking down compromised systems automatically — including Linux servers.