If an attacker gets admin control over the on-premises Exchange server, they can forge authentication tokens or make API ...

Over 29,000 Microsoft Exchange servers remain unpatched against a vulnerability that could allow attackers to seize control ...

Microsoft has warned customers to mitigate a high-severity vulnerability in Exchange Server hybrid deployments that could allow attackers to escalate privileges in Exchange Online cloud environments ...

Microsoft said the company has been "coordinating closely with CISA, DOD Cyber Defense Command, and key cybersecurity ...

To secure the endpoints, Microsoft recommends applying the July 2025 security updates immediately, as well as enabling Antimalware Scan Interface (AMSI) for SharePoint and making sure Defender ...

Microsoft has urged its customers to be on high alert after discovering a dangerous vulnerability in hybrid Exchange ...

CISA has warned that a critical vulnerability in Microsoft Exchange Servers poses a grave risk to entire Microsoft 365 ...

The Department of Homeland Security's Cybersecurity and Infrastructure Security Agency (CISA) has posted an alert saying it is aware of "active exploitation" of a new vulnerability to Microsoft ...

Cybercriminals are abusing the link wrapping security feature from Proofpoint and Intermedia to launch sophisticated phishing ...

Today is Microsoft's August 2025 Patch Tuesday, which includes security updates for 107 flaws, including one publicly ...

Microsoft fixed 111 vulnerabilities, including a Windows Kerberos zero-day enabling full AD compromise via BadSuccessor.

"In an Exchange hybrid deployment, an attacker who first gains administrative access to an on-premises Exchange server could ...