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07/08/2025
Zero-Day Initiative

ZDI-25-819: (0Day) Microsoft Windows NetBIOS Hostname SmartScreen Bypass Remote Code Execution Vulnerability

by Deepanshu Jha
This vulnerability allows network-adjacent attackers to bypass the SmartScreen security feature on affected installations of Microsoft Windows. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The ZDI has assigned a CVSS rating of 7.1.
  • Next ZDI-25-820: (0Day) Microsoft SharePoint IsAuthorizedType Deserialization of Untrusted Data Information Disclosure and Denial-of-Service Vulnerability
  • Previous ZDI-25-818: (0Day) Microsoft Windows OneDrive SmartScreen Bypass Vulnerability

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