CVE-2026-41091

LLM-synthesized narrative grounded in this CVE's description and references.

• Microsoft/Malware Protection Engine

  cpe:2.3:a:microsoft:malware_protection_engine:*:*:*:*:*:*:*:*

  Range: >=1.1.26030.3008,<1.1.26040.8
• Microsoft/Defenderllm-fuzzy

• msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41091nvdVendor Advisory
• www.cisa.gov/known-exploited-vulnerabilities-catalognvdUS Government ResourceThird Party Advisory

• Microsoft working on a fix for RoguePlanet, a flaw that grants full PC control
  Malwarebytes Labs · Jun 18, 2026
• Microsoft Confirms RoguePlanet Defender Zero-Day, Says Patch is in Development
  The Hacker News · Jun 17, 2026
• Microsoft Working on Patch for ‘RoguePlanet’ Zero-Day
  SecurityWeek · Jun 17, 2026
• 15th June – Threat Intelligence Report
  Check Point Research · Jun 15, 2026
• Microsoft ships largest Patch Tuesday on record, with one bug under active attack
  The Record · Jun 10, 2026
• New Windows Zero-Day Exploit ‘RoguePlanet’ Released
  SecurityWeek · Jun 10, 2026
• Microsoft Defender RoguePlanet Zero-Day Grants SYSTEM Access on Updated Windows
  The Hacker News · Jun 10, 2026
• Patch Tuesday - June 2026
  Rapid7 Blog · Jun 9, 2026
• Microsoft breaks Patch Tuesday record with 206 vulnerabilities
  CyberScoop · Jun 9, 2026
• Microsoft’s June 2026 Patch Tuesday Addresses 198 CVEs ( CVE-2026-49160, CVE-2026-50507)
  Tenable Blog · Jun 9, 2026
• June 2026 Patch Tuesday forecast: Where are the CVEs?
  Help Net Security · Jun 5, 2026
• Microsoft Tries to Calm Legal Threat Fears After Zero-Day Disclosure Backlash
  SecurityWeek · Jun 3, 2026
• Microsoft MSRC Allegedly Dismissed Dependency Confusion Vulnerability, Claims Researcher
  Cyber Security News · Jun 2, 2026
• Critical Windows Netlogon RCE flaw now exploited in attacks
  BleepingComputer · Jun 1, 2026
• Microsoft Clarifies It Won’t Sue Security Researchers Amid Nightmare-Eclipse Controversy
  Cyber Security News · Jun 1, 2026
• Microsoft Slams Public Zero-Day Disclosures Amid GitHub Researcher Account Removal
  The Hacker News · May 28, 2026
• Microsoft Condemns "Uncoordinated" Zero Day Disclosures
  Infosecurity Magazine · May 28, 2026
• Microsoft Warns Public Release of Zero-Day Details Before Vendor Coordination
  Cyber Security News · May 28, 2026
• 25th May – Threat Intelligence Report
  Check Point Research · May 25, 2026
• ⚡ Weekly Recap: Linux Flaws, Defender 0-Days, Router Botnets, and Supply Chain Chaos
  The Hacker News · May 25, 2026
• Week in review: GitHub breached via poisoned VS Code extension, critical NGINX flaw exploited
  Help Net Security · May 24, 2026
• The Good, the Bad and the Ugly in Cybersecurity – Week 21
  SentinelOne Labs · May 22, 2026
• Microsoft Defender vulnerabilities exploited in the wild (CVE-2026-41091, CVE-2026-45498)
  Help Net Security · May 21, 2026
• Microsoft Warns of Two Actively Exploited Defender Vulnerabilities
  The Hacker News · May 21, 2026
• Microsoft Patches Exploited UnDefend and RedSun Defender Zero-Days
  SecurityWeek · May 21, 2026
• Microsoft warns of new Defender zero-days exploited in attacks
  BleepingComputer · May 21, 2026
• Microsoft: 6 Actively-Exploited Flaws Added to CISA KEV
  Vypr Intelligence · May 20, 2026
• CISA Adds Seven Known Exploited Vulnerabilities to Catalog
  CISA Alerts