A new wave of attacks is quietly abusing everyday collaboration tools to bypass user suspicion and gain hands-on control of corporate endpoints. Threat actors are impersonating internal IT helpdesk staff inside Microsoft Teams, convincing employees to grant remote access via Quick Assist, and then using that live access to deploy stealthy persistence mechanisms and move laterally through enterprise networks. Because
Category: Microsoft
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Windows 11 Dev Build 26300.8170 Brings Clearer Secure Boot Visibility and Bigger FAT32 Drives
Microsoft’s latest Windows 11 Insider Preview for the Dev Channel, build 26300.8170, focuses on practical visibility and storage usability rather than flashy new features. For security-minded users and administrators, the standout change is a revamped Secure Boot display in Windows Security that finally gives clear, at-a-glance information about firmware-level protections and certificate health. Complementing that, the build addresses long-standing storage
New RDP Alert After April 2026 Security Update Warns of Unknown Connections
Microsoft’s April 2026 Patch Tuesday introduced a small-looking but important change to how Windows handles Remote Desktop (.rdp) files. What used to be a silent, one-click experience can now surface clear warnings about unknown connections and requested local resource access, closing an easy door attackers have been exploiting for phishing and session hijacking. For organizations and individual users alike, the
Microsoft Teams Desktop Update Breaks Launch for Some Users After Caching Regression
A subset of Microsoft Teams desktop users found themselves unable to launch the application after a recent service update introduced a caching regression. Affected clients became stuck on the loading screen, displaying an error that advised users to refresh, and could not complete the app’s startup sequence. Microsoft has acknowledged the incident and moved to roll back the update while
Recently Leaked Windows Zero-Days Now Being Actively Exploited: What You Need to Know
Threat actors have begun abusing three recently disclosed Windows vulnerabilities to escalate privileges and interfere with Microsoft Defender, shifting a theoretical disclosure debate into a real-world security crisis. A security researcher known as “Chaotic Eclipse” (also called “Nightmare-Eclipse”) released proof-of-concept exploit code for all three flaws earlier this month, and multiple security teams have since observed the techniques used in
RedSun: New Microsoft Defender Zero-Day Lets Unprivileged Users Gain SYSTEM Access
A freshly disclosed zero-day vulnerability in Microsoft Defender, dubbed “RedSun,” has raised alarms across enterprise security teams: an unprivileged user can escalate to full SYSTEM-level access on fully patched Windows systems. The flaw was detailed publicly in April 2026 by a researcher known as “Chaotic Eclipse” (also referenced as Nightmare‑Eclipse on GitHub). Independent verification from vulnerability analyst Will Dormann confirms