External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spoofing over a network.
Medium CVSS 6.5
Summary
External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spoofing over a network.
In-depth triage · Auto channel
No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).
Affected products
- :
Lint boundary warnings (2)
The following non-blocking warnings were raised during the lint phase of this triage (e.g. reference URLs not yet on the allowlist). They do not affect entry usability and are disclosed for transparency (see DR-002).
-
REF_URL_NOT_ALLOWLISTEDurl not in allowlist: https://www.vicarius.io/vsociety/posts/cve-2026-20872-detection-script-spoofing-vulnerability-in-windows-ntlm -
REF_URL_NOT_ALLOWLISTEDurl not in allowlist: https://www.vicarius.io/vsociety/posts/cve-2026-20872-mitigation-script-spoofing-vulnerability-in-windows-ntlm
Sources
- NVD DATABASE
Original Links
- 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
Timeline
- nvd_ingest NVD