CVE-2026-21249

CWE-735 documents5 sources
Severity
3.3LOW
EPSS
0.1%
top 82.46%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
27
Microsoft Windows 10 Version 1607Microsoft Windows 10 Version 1809Microsoft Windows 10 Version 21h2+24 more
Timeline
PublishedFeb 10

Description

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

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:NExploitability: 1.8 | Impact: 1.4

Affected Packages26 packages

▶NVDmicrosoft/windows< 10.0.14393.8868+5
▶NVDmicrosoft/windows_10_1607< 10.0.14393.8868
▶NVDmicrosoft/windows_10_1809< 10.0.17763.8389
▶NVDmicrosoft/windows_10_21h2< 10.0.19044.6937
▶NVDmicrosoft/windows_10_22h2< 10.0.19045.6937

🔴Vulnerability Details

2
CVEList
Windows NTLM Spoofing Vulnerability↗2026-02-10
▶
GHSA
GHSA-w882-rf7q-923g: External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spoofing locally↗2026-02-10
▶

📋Vendor Advisories

1
Microsoft
Windows NTLM Spoofing Vulnerability↗2026-02-10
▶

🕵️Threat Intelligence

1
Wiz
CVE-2026-21249 Impact, Exploitability, and Mitigation Steps | Wiz↗
▶
CVE-2026-21249 (LOW CVSS 3.3) | External control of file name or pa | cvebase.io