Security Feature Bypass in UrlMon by Microsoft
CVE-2025-29842

7.5HIGH

Key Information:

Vendor

Microsoft
Status
Windows 10 Version 22h2
Windows Server 2022
Windows Server 2022, 23h2 Edition (server Core Installation)
Windows 11 Version 24h2
Vendor
CVE Published:
13 May 2025
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What is CVE-2025-29842?

The UrlMon vulnerability allows unauthorized users to potentially bypass critical security features by accepting untrusted data alongside trusted data over a network. This could expose systems to a range of security risks, as attackers might exploit this weakness to manipulate system behavior, execute unauthorized actions, or access sensitive information.

Affected Version(s)

Windows 10 Version 1507 32-bit Systems 10.0.10240.0 < 10.0.10240.21014

Windows 10 Version 1607 x64-based Systems 10.0.14393.0 < 10.0.14393.8066

Windows 10 Version 1809 32-bit Systems 10.0.17763.0 < 10.0.17763.7314

References

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

CVSS V3.1

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

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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CVE-2025-29842 : Security Feature Bypass in UrlMon by Microsoft