Knostic found 1,862 MCP servers exposed with zero authentication. Here are five actions CISOs should take now.

Microsoft released an out-of-band update Friday to resolve credential authentication failures affecting Azure Virtual Desktop and Windows 365 connections that emerged after the company's January 2026 ...

U.S. cybersecurity agency CISA is warning about two critical vulnerabilities that allow authentication bypass and remote code execution in Optigo Networks ONS-S8 Aggregation Switch products used in ...

It appears many Mail users are having authentication problems in which they are prompted for the username and password every time a message is sent (either manually ...

Authentication issues in Windows Server after April updates Logon failures for WHfB and Device Public Key Authentication Workaround available, Microsoft working on permanent fix for impacted Windows ...

Microsoft says the April 2025 security updates are causing authentication issues on some Windows Server 2025 domain controllers. The list of impacted platforms includes Windows Server 2016, Windows ...