What’s Vulnerable › Vulnerabilities
CVE-2026-23656: Windows App Installer Spoofing Vulnerability
- Severity: medium (CVSS 5.9 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-03-10 · updated 2026-06-19
- Weakness: CWE-345
Description
Insufficient verification of data authenticity in Windows App Installer allows an unauthorized attacker to perform spoofing over a network.
Affected products
- Microsoft Windows App Client for Windows Desktop: before 2.0.964.0 — fixed in 2.0.964.0
- Microsoft Windows App Client for Windows Desktop: from 1.00 before 2.0.964 — fixed in 2.0.964
How to fix
Upgrade to a fixed version: Microsoft Windows App Client for Windows Desktop 2.0.964.0; Microsoft Windows App Client for Windows Desktop 2.0.964. Check the vendor advisory for mitigations.
References
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