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Microsoft Security Response CenterCVE-2026-41091

Microsoft Defender Elevation of Privilege Vulnerability

HighVendor CVSS 7.8 / 10 1 CVE Published May 19, 2026 at 7:00 AM UTC

Summary

Improper link resolution before file access ('link following') in Microsoft Defender allows an authorized attacker to elevate privileges locally.

Products covered

  • Microsoft Malware Protection Engine

Remediation

Release Notes

Vendor-listed fixes

  • 1.1.26040.8

CVEs in this advisory 1

Updates

  1. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  2. Updated by Microsoft Security Response Center

    The vendor changed the advisory after it was first published.

  3. Added to SecurityAlert

    We collected the advisory from the official source.

  4. Confirmed at the source

    Our collector saw this advisory during a later source check.