Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2026-20872

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
13/01/2026
Last modified:
15/01/2026

Description

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

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N CVSS v3.1 Severity and Metrics:

Base Score: 6.50 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): None
Availability (A): None

Base Score 3.x
6.50
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:* 10.0.14393.8783 (excluding)
cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:* 10.0.14393.8783 (excluding)
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:* 10.0.17763.8276 (excluding)
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:* 10.0.17763.8276 (excluding)
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:* 10.0.19044.6809 (excluding)
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:*:* 10.0.19045.6809 (excluding)
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:* 10.0.22631.6491 (excluding)
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:*:* 10.0.26100.7623 (excluding)
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:*:* 10.0.26200.7623 (excluding)
cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:* 10.0.14393.8783 (excluding)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools