Windows 10 1607
CVE-2026-20872
MEDIUM
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Primary rating from Vendor (microsoft) · only source for this CVE.
CVSS VectorVendor: microsoft
Lifecycle Timeline
2DescriptionCVE.org
External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spoofing over a network.
AnalysisAI
Windows NTLM authentication is vulnerable to path manipulation attacks that enable network-based spoofing when users interact with malicious content, affecting Windows 10 22H2 and Windows Server editions 2008-2016. An unauthenticated attacker can exploit improper file name or path validation to impersonate legitimate systems or services, potentially redirecting authentication requests to attacker-controlled resources. No patch is currently available for this vulnerability.
Technical ContextAI
Affects Windows 10 1607. External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spoofing over a network.
RemediationAI
Monitor vendor advisories for a patch. Restrict network access to the affected service where possible.
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Same weakness CWE-73 – External Control of File Name or Path
View allSame technique Authentication Bypass
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External POC / Exploit Code
Leaving vuln.today