Information Disclosure Vulnerability in Windows Web Threat Defense by Microsoft
CVE-2025-21343

7.5HIGH

Key Information:

Vendor

Microsoft
Status
Windows 11 Version 22h2
Windows 11 Version 22h3
Windows 11 Version 23h2
Windows 11 Version 24h2
Vendor
CVE Published:
14 January 2025

What is CVE-2025-21343?

The vulnerability in Windows Web Threat Defense allows an attacker to gain unauthorized access to sensitive information via the User Service. This can lead to potential exposure of critical data, making it essential for users and administrators to mitigate risks by applying security updates and monitoring their systems closely.

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Affected Version(s)

Windows 11 version 22H2 ARM64-based Systems 10.0.22621.0 < 10.0.22621.4751

Windows 11 version 22H3 ARM64-based Systems 10.0.22631.0 < 10.0.22631.4751

Windows 11 Version 23H2 x64-based Systems 10.0.22631.0 < 10.0.22631.4751

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisory

EPSS Score

7% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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