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Microsoft Security Response CenterCVE-2026-56165

Microsoft Account Remote Code Execution Vulnerability

CriticalVendor CVSS 9.8 / 10 1 CVE Published Jul 23, 2026 at 7:00 AM UTC

Summary

Heap-based buffer overflow in Microsoft Account allows an unauthorized attacker to execute code over a network.

Products covered

  • Microsoft Account

Remediation

Separate remediation guidance was not included in the collected bulletin.

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.