CVE-2026-20872
MEDIUM severity · CVSS 6.5 · CWE-73
6.5CVSS MEDIUM
Summary
External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spoofing over a network.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionRequired
Confidentiality impactHigh
Integrity impactNone
Availability impactNone
Exploit probability (EPSS)19%
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Affected products we track (4)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Additional information
- NVD record
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20872Advisory
- 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