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Microsoft Security Response CenterCVE-2026-70264

Microsoft Defender Information Disclosure Vulnerability

HighVendor CVSS 5.5 / 10 1 CVE Published Oct 13, 2026 at 7:00 AM UTC

Summary

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

Products covered

  • Windows Defender

Remediation

Release Notes

Vendor-listed fixes

  • 1.1.26090.9

CVEs in this advisory 1

Updates

  1. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  2. Added to SecurityAlert

    We collected the advisory from the official source.

  3. Confirmed at the source

    Our collector saw this advisory during a later source check.