Microsoft has released updates to address four previously unknown or 'zero-day' vulnerabilities in Exchange Server that were being used in limited targeted attacks, according to Microsoft. Microsoft ...

Microsoft has released patches for four critical vulnerabilities being used to target on-premises versions of Microsoft Exchange Server in "limited and targeted" attacks. It attributes the activity to ...

Organisations using on-premises versions of Microsoft Exchange Server are at risk of targeted attacks exploiting three newly-disclosed zero-day exploits, which are already being taken advantage of by ...

At least 10 different advanced persistent threat (APT) groups in addition to China-linked Hafnium have been actively exploiting the recent Microsoft Exchange security flaws since Microsoft started ...