What is CVE-2026-23657?

CVE-2026-23657 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. Microsoft Word Remote Code Execution Vulnerability

Which CVE IDs does CVE-2026-23657 cover?

CVE-2026-23657 covers the following CVE IDs: CVE-2026-23657. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-23657?

CVE-2026-23657 has a CVSS v3 base score of 7.8, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-23657?

CVE-2026-23657 affects 4 products, including: 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.

CVE-2026-23657HighCVSS 7.8

Microsoft Word Remote Code Execution Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

June 2, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-23657 →

📋 Description

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

🎯 Affected products4

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

KBClick to Run (Security Update) — fixed build https://aka.ms/OfficeSecurityReleases

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23657
referencehttps://docs.microsoft.com/en-us/officeupdates/office365-proplus-security-updates