CVE-2026-20872: CWE-73: External Control of File Name or Path in Microsoft Windows 10 Version 1607
External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spoofing over a network.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-20872) affects Windows 10 Version 1607 (build 10.0.14393.0) and is classified under CWE-73 (External Control of File Name or Path). It involves improper handling of file names or paths in the NTLM authentication process, which could be manipulated by an attacker to spoof network communications. The CVSS 3.1 base score is 6.5, reflecting network attack vector, low attack complexity, no privileges required, user interaction required, unchanged scope, high confidentiality impact, and no integrity or availability impact. The vulnerability is officially published and a patch is available from Microsoft.
Potential Impact
An attacker exploiting this vulnerability could perform spoofing attacks over the network, potentially leading to unauthorized disclosure of information. The impact is limited to confidentiality with no direct integrity or availability effects. No known exploits are currently reported in the wild.
Mitigation Recommendations
A patch is available for this vulnerability. It is recommended to apply the official Microsoft update for Windows 10 Version 1607 to remediate this issue. Since the vendor has provided a fix, updating to the patched version is the primary mitigation step.
CVE-2026-20872: CWE-73: External Control of File Name or Path in Microsoft Windows 10 Version 1607
Description
External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spoofing over a network.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-20872) affects Windows 10 Version 1607 (build 10.0.14393.0) and is classified under CWE-73 (External Control of File Name or Path). It involves improper handling of file names or paths in the NTLM authentication process, which could be manipulated by an attacker to spoof network communications. The CVSS 3.1 base score is 6.5, reflecting network attack vector, low attack complexity, no privileges required, user interaction required, unchanged scope, high confidentiality impact, and no integrity or availability impact. The vulnerability is officially published and a patch is available from Microsoft.
Potential Impact
An attacker exploiting this vulnerability could perform spoofing attacks over the network, potentially leading to unauthorized disclosure of information. The impact is limited to confidentiality with no direct integrity or availability effects. No known exploits are currently reported in the wild.
Mitigation Recommendations
A patch is available for this vulnerability. It is recommended to apply the official Microsoft update for Windows 10 Version 1607 to remediate this issue. Since the vendor has provided a fix, updating to the patched version is the primary mitigation step.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2025-12-03T05:54:20.382Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 69668ae1a60475309f9ae169
Added to database: 1/13/2026, 6:11:45 PM
Last enriched: 4/4/2026, 10:45:28 AM
Last updated: 5/8/2026, 8:32:01 PM
Views: 232
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