What is CVE-2026-23656?

CVE-2026-23656 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. Windows App Installer Spoofing Vulnerability

Which CVE IDs does CVE-2026-23656 cover?

CVE-2026-23656 covers the following CVE IDs: CVE-2026-23656. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-23656?

CVE-2026-23656 has a CVSS v3 base score of 5.9, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-23656?

CVE-2026-23656 affects 1 product, including: Windows App Client for Windows Desktop.

CVE-2026-23656HighCVSS 5.9

Windows App Installer Spoofing Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

May 31, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-23656 →

📋 Description

Insufficient verification of data authenticity in Windows App Installer allows an unauthorized attacker to perform spoofing over a network.

🎯 Affected products1

Windows App Client for Windows Desktop

✅ Remediation

Security Update — fixed build 2.0.964

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23656
patchhttps://apps.microsoft.com/detail/9n1f85v9t8bn?hl=en-US&gl=US