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Microsoft Security Response CenterCVE-2026-23657

Microsoft Word Remote Code Execution Vulnerability

HighVendor CVSS 7.8 / 10 1 CVE Published Apr 14, 2026 at 7:00 AM UTC

Summary

Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.

Products covered

  • Microsoft 365 Apps for Enterprise for 32-bit Systems

  • Microsoft 365 Apps for Enterprise for 64-bit Systems

  • Microsoft Office LTSC 2024 for 32-bit editions

  • Microsoft Office LTSC 2024 for 64-bit editions

Remediation

Click to Run

Vendor-listed fixes

  • https://aka.ms/OfficeSecurityReleases

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.