Spoofing attack in Microsoft Windows SmartScreen

1) Spoofing attack

EUVDB-ID: #VU102743

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2025-21314

CWE-ID: CWE-451 - User Interface (UI) Misrepresentation of Critical Information (Clickjacking, spoofing)

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to incorrect processing of user-supplied data in Windows SmartScreen. A remote attacker can spoof page content.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Windows Server: 2016 10.0.14393.10 - 2025 10.0.26100.2605

Windows: 10 21H2 10.0.19041.3920 - 11 24H2 10.0.26100.2894

CPE2.3

• cpe:2.3:o:microsoft:windows_server:2016:10.0.14393.10:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server:2016:10.0.14393.51:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server:2016:10.0.14393.82:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server:2016:10.0.14393.105:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server:2016:10.0.14393.187:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server:2016:10.0.14393.222:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server:2016:10.0.14393.321:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server:2016:10.0.14393.351:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server:2016:10.0.14393.447:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server:2016:10.0.14393.479:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows:10:21H2_10.0.19041.3920:*:*:*:*:*:*

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-21314

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.