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 ...

Update 5/20: Microsoft now considers these authentication problems to be resolved, having released “out-of-band” updates on May 19, as described here. Microsoft this week acknowledged possible ...

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 ...

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 ...

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 ...

A number of distinct developments brought about the current authentication schemes we see in networks today.In the '70s, the creators of UNIX recognized that in order to give a number of individuals ...

Following two weeks of extreme chaos at Twitter, users are joining and fleeing the site in droves. More quietly, many are likely scrutinizing their accounts, checking their security settings, and ...

One hacked AI agent took down 50 others, proving that agentic AI needs a “DNS for trust” before autonomy turns into chaos.