Windows
CVE-2026-23656
MEDIUM
Severity by source
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
Lifecycle Timeline
2DescriptionCVE.org
Insufficient verification of data authenticity in Windows App Installer allows an unauthorized attacker to perform spoofing over a network.
AnalysisAI
Windows App Installer fails to adequately authenticate package data, enabling network-based attackers to conduct spoofing attacks without user interaction. This vulnerability affects Windows and Windows App installations, potentially allowing threat actors to deceive users into installing malicious or tampered applications. While no patch is currently available, the low EPSS score suggests exploitation is unlikely in the near term.
Technical ContextAI
Classified as CWE-345 (Insufficient Verification of Data Authenticity). Affects Windows App. Insufficient verification of data authenticity in Windows App Installer allows an unauthorized attacker to perform spoofing over a network.
RemediationAI
Monitor vendor advisories for a patch. Restrict network access to the affected service where possible.
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External POC / Exploit Code
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