CVE-2026-49176 - Windows WalletService Elevation of Privilege Vulnerability - is an improper privilege management issue in Windows WalletService that can be used for elevation of privilege. It has a CVSS v3.1 base score of 7.8 (High) and a temporal score of 6.8. The vector is local-only, with low attack complexity, low privileges required, no user interaction, unchanged scope, and high confidentiality, integrity, and availability impact. Microsoft reports no public disclosure and no known exploitation, with exploit code maturity unproven. Because the attack is local rather than network-exposed, enterprise risk is primarily on systems where an attacker can obtain local execution or low-privilege access.

Highlights:
- CVSS scores: Base 7.8 - Temporal 6.8
- Exploit status & code maturity: Publicly Disclosed: No; Exploited: No; Latest Software Release: Exploitation Less Likely; Exploit Code Maturity: UNPROVEN.
- Impact: Elevation of Privilege with HIGH confidentiality, HIGH integrity, and HIGH availability impacts.
- Exploitation likelihood: Exploitation Less Likely; vector is LOCAL with LOW attack complexity, LOW privileges required, and NO user interaction.
- Severity for enterprise: High severity, but risk is constrained by the local attack vector rather than network exposure; highest concern is on endpoints and servers where untrusted local code or low-privilege access is possible.
- Patch status: available; customer action required.

Affected systems:
- Windows 10 1607
- Windows 10 1809
- Windows 10 21H2
- Windows 10 22H2
- Windows 11 24H2
- Windows 11 25H2
- Windows 11 26H1
- Windows 11 unspecified
- Windows Server 2016
- Windows Server 2019
- Windows Server 2022
- Windows Server 2025