CVE-2025-21343

Windows Web Threat Defense User Service Information Disclosure Vulnerability

Description

Windows Web Threat Defense User Service Information Disclosure Vulnerability

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 1.40% Top 25%
Vendor Advisory microsoft.com
Affected: Microsoft Windows 11 version 22H2
Affected: Microsoft Windows 11 version 22H3
Affected: Microsoft Windows 11 Version 23H2
Affected: Microsoft Windows 11 Version 24H2
Published at:
Updated at:

References

Link Tags
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21343 patch vendor advisory

Frequently Asked Questions

What is the severity of CVE-2025-21343?
CVE-2025-21343 has been scored as a high severity vulnerability.
How to fix CVE-2025-21343?
To fix CVE-2025-21343, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-21343 being actively exploited in the wild?
It is possible that CVE-2025-21343 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-21343?
CVE-2025-21343 affects Microsoft Windows 11 version 22H2, Microsoft Windows 11 version 22H3, Microsoft Windows 11 Version 23H2, Microsoft Windows 11 Version 24H2.
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