CVE-2026-21249 LOW

CVE-2026-21249: Windows NTLM Spoofing Vulnerability

Vendor Microsoft
Product Windows 10 Version 1607
Weakness CWE-73
Published February 10, 2026
Last update May 11, 2026
View on NVD All CVEs

CVSS base score

3.3/10
Attack vector Local
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality Low
Integrity None

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C

What the vulnerability does

01Description

External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spoofing locally.

Key dates

02Disclosure timeline

February 10, 2026 CVE published
May 11, 2026 Record updated