Improper Resolution of Path Equivalence in Microsoft Windows - CVE-2026-108463
Published: October 13, 2026
Vulnerability identifier: #VU154371
CSH Severity: High
CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-108463
CWE-ID: CWE-41
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass SmartScreen's source reputation checks.
The vulnerability exists due to improper resolution of path equivalence in Windows SmartScreen when evaluating application installations initiated from specially crafted links. A remote attacker can convince a user to install an application from a specially crafted link to bypass SmartScreen's source reputation checks.
Affected software
Microsoft Windows
How to mitigate CVE-2026-108463
Install security update from vendor's website.
Microsoft Windows - addressed in versions 11 24H2 10.0.26100.9711, 11 25H2 10.0.26200.9711, 11 26H1 10.0.28000.3231