CVE-2025-21343: CWE-269: Improper Privilege Management in Microsoft Windows 11 version 22H2
Windows Web Threat Defense User Service Information Disclosure Vulnerability
AI Analysis
Technical Summary
CVE-2025-21343 is an information disclosure vulnerability caused by improper privilege management in the Windows Web Threat Defense User Service on Windows 11 version 22H2 (build 10.0.22621.0). The vulnerability allows an unauthenticated attacker to gain access to sensitive information, impacting confidentiality but not integrity or availability. The vulnerability has a CVSS v3.1 base score of 7.5, indicating high severity. Microsoft has released an official fix to address this issue.
Potential Impact
Successful exploitation of this vulnerability results in unauthorized disclosure of sensitive information from the affected Windows 11 system. There is no impact on system integrity or availability. The vulnerability can be exploited remotely without user interaction or privileges, increasing its risk profile.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21343 to remediate this vulnerability.
CVE-2025-21343: CWE-269: Improper Privilege Management in Microsoft Windows 11 version 22H2
Description
Windows Web Threat Defense User Service Information Disclosure Vulnerability
CVSS v3.1
Score 7.5high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2025-21343 is an information disclosure vulnerability caused by improper privilege management in the Windows Web Threat Defense User Service on Windows 11 version 22H2 (build 10.0.22621.0). The vulnerability allows an unauthenticated attacker to gain access to sensitive information, impacting confidentiality but not integrity or availability. The vulnerability has a CVSS v3.1 base score of 7.5, indicating high severity. Microsoft has released an official fix to address this issue.
Potential Impact
Successful exploitation of this vulnerability results in unauthorized disclosure of sensitive information from the affected Windows 11 system. There is no impact on system integrity or availability. The vulnerability can be exploited remotely without user interaction or privileges, increasing its risk profile.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21343 to remediate this vulnerability.
Technical Details
- Data Version
- 5.1
- Assigner Short Name
- microsoft
- Date Reserved
- 2024-12-11T00:29:48.353Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21343","vendor":"Microsoft"}]
Threat ID: 68c0bd529ed239a66badebf7
Added to database: 09/09/2025, 23:50:42 UTC
Last enriched: 06/10/2026, 09:57:14 UTC
Last updated: 07/06/2026, 20:51:16 UTC
Views: 205
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