CVE-2025-21343
Windows Web Threat Defense User Service Information Disclosure Vulnerability
Windows Web Threat Defense User Service Information Disclosure Vulnerability
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Windows Web Threat Defense User Service Information Disclosure Vulnerability
Windows Web Threat Defense User Service Information Disclosure Vulnerability
- Record
CVE-2025-21343- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C - Weakness
- CWE-269
- Updated
- 2026-11-02
EUVDEUVD-2025-2408
Windows Web Threat Defense User Service Information Disclosure Vulnerability
- Record
EUVD-2025-2408- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-rrm6-257m-2hgw
Windows Web Threat Defense User Service Information Disclosure Vulnerability
Windows Web Threat Defense User Service Information Disclosure Vulnerability
- Record
GHSA-rrm6-257m-2hgw- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-269
- Updated
- 2026-11-02
NVD
Windows Web Threat Defense User Service Information Disclosure Vulnerability
- Record
CVE-2025-21343- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-269
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-21343 is a high vulnerability (CVSS 7.5) in Microsoft Windows 11 Version 22h2, published January 14, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.37%, the 72nd percentile. No source names a fixed version.