Windows WalletService Vulnerability Allows Privilege Escalation to SYSTEM

CVE-2026-49176 is a local privilege escalation vulnerability in Windows WalletService, allowing standard users to gain SYSTEM-level privileges. The flaw arises from improper handling of user-controlled file paths during initialization, enabling attackers to redirect WalletService to a malicious ESE database. Researchers demonstrated an exploit chain that does not require administrative privileges, allowing a low-privileged user to invoke WalletService through a public WinRT interface. This vulnerability is significant in shared environments, where it could lead to complete system compromise. Microsoft has rated this issue as Important, with a CVSS score of 7.8. The vulnerability was published on July 14, 2026, with the first proof of concept released on July 16, 2026. Security updates are recommended to mitigate the risk.

Key Points: • CVE-2026-49176 allows standard users to escalate privileges to SYSTEM on Windows. • The exploit leverages improper file path handling in WalletService during initialization. • Microsoft rates the vulnerability as Important, with a CVSS score of 7.8.