#microsoft-defender
17 stories taggedmicrosoft-defender.
Fake Meeting Invites Are Now Delivering Real Remote-Control Software
Microsoft says attackers are skipping the malware and installing legitimate MSP360 and ScreenConnect on victim machines, giving themselves a hands-on-keyboard foothold that looks like normal IT admin work.
A researcher keeps dropping Windows Defender zero-days, and Microsoft is losing patience
Abdelhamid Naceri's latest proof-of-concept, BigDiskBuster, stops Microsoft's built-in antivirus from updating. It is the eleventh unpatched flaw he has posted this year in a public feud with Redmond.
Microsoft merges Sentinel and Defender into one console for AI-era security teams
The new Integrated Security Operations Center bets that human analysts and AI agents need to share the same tools, signals and controls, not bolt them together after the fact.
Microsoft says Defender missed 221 high-severity emails per thousand users and still won its own benchmark
The vendor's fifth quarterly scorecard shows missed-threat rates climbing across the industry as AI-written phishing gets harder to catch.
Researcher Says Microsoft's Fix for Defender Flaw Doesn't Hold
A second proof-of-concept, nicknamed ShieldCrash, claims to walk straight past Microsoft's patch for the ShieldBreak vulnerability in Defender.
Microsoft Defender for Office 365 is blocking Google search links by mistake
A faulty security classification inside Safe Links is flagging normal Google URLs as malicious, and copy-pasting them into a browser does not help.
Microsoft: Ignore the 'Antivirus Is Off' Warnings in Defender, It's a False Alarm
A bad notification, not a broken product. Microsoft says Defender is running normally despite pop-ups claiming otherwise, and a fix is on the way.
Microsoft's Own Antivirus Driver Can Be Turned Into a Weapon at Boot
Check Point researchers show how BTR.sys, the trusted cleanup tool inside Microsoft Defender, can be steered to wipe files and registry keys before Windows even finishes starting.
Microsoft Pushes 22 Security Fixes, Six Rated Maximum Severity
A batch of patches covers Microsoft's cloud and identity products, with six flaws scoring a perfect 10 out of 10 on the severity scale. Most fixes apply automatically, but one Defender vulnerability is still waiting for a patch.
Windows Defender Crashed Mid-Scan After Buggy Update, Microsoft Ships Fix
A faulty signature update knocked out Microsoft's built-in antivirus on Windows 10 and 11 machines this week, leaving scans failing and some users reinstalling their operating system before a patch arrived.
Microsoft Ties 30+ Rotating Domains to MacSync, a New Mac Data-Stealing Malware
Defender Experts traced the macOS stealer across shifting web infrastructure by matching endpoint and network behaviour, not just domain names.
Akira gang reboots into Safe Mode to blind security tools, then fumbles the ransom
The hackers walked in through a SonicWall VPN with no second login step, but their own ransomware ran out of memory before it could lock a single file.
Researcher publishes 'ShieldBreak' code that claims to defeat a recent Microsoft Defender fix
A proof-of-concept from a researcher known as Chaotic Eclipse says the patch for CVE-2026-50656 can still be bypassed to gain full control of Windows machines.
Microsoft Warns of Two ACR Stealer Campaigns Stealing Credentials Through Fake Fixes
Between late April and mid-June 2026, two separate criminal campaigns used a trick called ClickFix to persuade workers to hand over browser passwords, session tokens, and business documents, with no software flaw required.
Microsoft patches 'RoguePlanet' Defender flaw after researcher publishes exploit in disclosure spat
The zero-day let attackers hand themselves the keys to a fully patched Windows machine. It was revealed by a researcher publicly feuding with Microsoft.