Microsoft Releases Guidance on High-Severity Vulnerability (CVE-2025-53786) in Hybrid Exchange Deployments

Update 08/12/2025: CISA has updated this alert to provide clarification on identifying Exchange Servers on an organization’s networks and provided further guidance on running the Microsoft Exchange Health Checker. Update 08/07/2025: CISA issued Emergency Directive ED 25-02: Mitigate Microsoft...

Security Updates for Microsoft Exchange Server (August 2025)

The Microsoft Exchange Server installed on the remote host is missing a security update. It is, therefore, affected by multiple vulnerabilities as referenced in the August, 2025 security bulletin. - Exposure of sensitive information to an unauthorized actor in Microsoft Exchange Server allows an...