Unauthenticated remote disclosure of sensitive information
Published Jan 14, 2025 · Updated Jun 9, 2026
Information disclosure in Microsoft Windows 11 Web Threat Defense User Service allows remote attackers to read sensitive data over a network. Microsoft identifies improper privilege management but has not published the affected operation, request path, or data exposed by the service. No authentication or user interaction is required; the documented impact is limited to confidentiality.
Summary
What happened
Information disclosure in Microsoft Windows 11 Web Threat Defense User Service allows remote attackers to read sensitive data over a network. Microsoft identifies improper privilege management but has not published the affected operation, request path, or data exposed by the service. No authentication or user interaction is required; the documented impact is limited to confidentiality.
The record
- CVE
- CVE-2025-21343
- Published
- Jan 14, 2025
- Updated
- Jun 9, 2026
- Vendor
- Microsoft
- Product
- Windows 11, version 24H2
- Classifications
- CWE-269
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 14, 2025CVE publishedPublication date reported by the CVE source.
- Jun 9, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0.26100.0 <10.0.26100.2894
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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