On Thursday, Microsoft shared mitigations for a high-severity Exchange Server vulnerability exploited in attacks that allow ...

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

Microsoft has disclosed a new security vulnerability impacting on-premise versions of Exchange Server that it said has come ...

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

Microsoft warned Exchange Server customers about critical OWA vulnerability CVE-2026-42897 affecting on-premises deployments.

The zero-day vulnerability affects on-premises installations for all versions of Exchange Server 2016, 2019 and Subscription ...

A newly discovered zero-day vulnerability in Microsoft Exchange Server has experts declaring an emergency and urging CSOs to ...

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 ...

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, ...

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

Microsoft Outlook users reported problems signing in to the email client at the start of the week, with reports beginning just before 5 a.m. ET Monday.  After several hours of login issues, a fix has ...