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Windows CVE-2025-49740

| EUVD-2025-20537 HIGH
Protection Mechanism Failure (CWE-693)
2025-07-08 secure@microsoft.com
Windows Authentication Bypass Microsoft Windows 10 1507 Windows 10 1607 Windows 10 1809 Windows 10 21h2 Windows 10 22h2 Windows 11 22h2 Windows 11 23h2 Windows 11 24h2 Windows Server 2016 Windows Server 2019 Windows Server 2022 Windows Server 2022 23h2 Windows Server 2025
8.8
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

6
Analysis Updated
Apr 16, 2026 - 06:28 EUVD-patch-fix
executive_summary
Re-analysis Queued
Apr 16, 2026 - 05:29 backfill_euvd_patch
patch_released
Patch available
Apr 16, 2026 - 05:29 EUVD
10.0.14393.8246,10.0.17763.7558,10.0.25398.1732
EUVD ID Assigned
Mar 16, 2026 - 04:21 euvd
EUVD-2025-20537
Analysis Generated
Mar 16, 2026 - 04:21 vuln.today
CVE Published
Jul 08, 2025 - 17:16 nvd
HIGH 8.8

DescriptionNVD

Protection mechanism failure in Windows SmartScreen allows an unauthorized attacker to bypass a security feature over a network.

Analysis

Protection mechanism failure in Windows SmartScreen allows an unauthorized attacker to bypass a security feature over a network.

Technical ContextAI

This vulnerability is classified as Protection Mechanism Failure (CWE-693).

RemediationAI

Monitor vendor advisories for patches. Apply mitigations such as network segmentation, access restrictions, and monitoring.

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CVE-2025-49740 vulnerability details – vuln.today
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