Protection Mechanism Failure in Microsoft Windows and Windows Server - CVE-2025-49740

Vulnerability identifier: #VU112701

CSH Severity: High

CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-49740

CWE-ID: CWE-693

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to insufficient implementation of security measures in Windows SmartScreen. A remote attacker can trick a victim to launch malicious files and evade Mark of the Web (MOTW) defenses.

Microsoft Windows
Windows Server

Install updates from vendor's website.

Microsoft Windows - addressed in versions 10 21H2 10.0.19044.6093, 10 22H2 10.0.19045.6093, 10 1507 10.0.10240.21073, 10 1607 10.0.14393.8246, 10 1809 10.0.17763.7558, 11 22H2 10.0.22621.5624, 11 23H2 10.0.22631.5624, 11 24H2 10.0.26100.4652
Windows Server - addressed in versions 2016 10.0.14393.8246, 2019 10.0.17763.7558, 2022 23H2 10.0.22621.5472, 2022 23H2 10.0.25398.1732, 2022 10.0.20348.3932, 2025 10.0.26100.4652

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49740

• Protection Mechanism Failure in Microsoft Windows SmartScreen