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Vulnerability record · CVE-2026-20872 · published 13 January 2026

CVE-2026-20872: Microsoft windows 10 1607 vulnerability

Microsoft · Windows 10 1607

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

6.5 CVSS 3.1 Medium EPSS 20% · top 2.6% CWE-73 · CWE-73
6.5CVSS 3.1 base score
20%EPSS exploitation probability, 30 days
NoNot in CISA KEV
14Affected product versions listed by NVD
3References
30 Jul 2026Last modified by NVD

Description

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

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Affected products

14 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20872 Vendor Advisory
https://www.vicarius.io/vsociety/posts/cve-2026-20872-detection-script-spoofing-vulnerability-in-windows-ntlm
https://www.vicarius.io/vsociety/posts/cve-2026-20872-mitigation-script-spoofing-vulnerability-in-windows-ntlm

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-20872), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.