Microsoft Exchange users are urged to mitigate a zero-day vulnerability that CISA has confirmed is under active exploitation.

Microsoft warns of a new zero-day vulnerability that leaves Exchange open to hackers.

Microsoft's May Patch Tuesday looked quiet. Since then, there's been an unpatched Exchange CVE, three Defender flaws, and a ...

The NSA, CISA, Australia’s Cyber Security Centre, and Canada’s Cyber Centre jointly released comprehensive security practices for Exchange hardening. If your team still runs Microsoft Exchange Server, ...

Forbes contributors publish independent expert analyses and insights. Davey Winder is a veteran cybersecurity writer, hacker and analyst. Update, August 10, 2025: This story, originally published on ...

Microsoft delivered fixes for issues affecting everything from Windows to Office, .NET, and SQL Server, and several patches ...

Microsoft has revealed a new threat affecting Microsoft Exchange Servers, a zero-day vulnerability that is reportedly being ...

Microsoft has said it has started to "deploy a fix" after users reported problems with Outlook and Teams. The technology giant said on Monday that users had been impacted due to a "recent change" to ...

Microsoft is working to fix a DNS misconfiguration that is causing one-time passcode (OTP) message delivery failures in Exchange Online for some users. Recipients may receive a single-use access code ...