Security Feature Bypass in Windows SmartScreen by Microsoft
CVE-2026-108463

8.8HIGH

Key Information:

Vendor

Microsoft
Status
Windows 11 Version 24h2
Windows 11 Version 25h2
Windows 11 Version 26h1
Windows 11 Version 26h2
Vendor
CVE Published:
13 October 2026

What is CVE-2026-108463?

A vulnerability in Windows SmartScreen allows unauthorized attackers to bypass its security features via improper resolution of path equivalence over a network. This breach can potentially lead to various attacks, compromising the overall security integrity of affected systems. Users are advised to stay informed on mitigation tactics to enhance security and protect against unauthorized access.

Affected Version(s)

Windows 11 Version 24H2 ARM64-based Systems 10.0.26100.0 < 10.0.26100.9711

Windows 11 Version 25H2 ARM64-based Systems 10.0.26200.0 < 10.0.26200.9711

Windows 11 version 26H1 ARM64-based Systems 10.0.28000.0 < 10.0.28000.3231

References

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

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.