Windows NTLM Spoofing Vulnerability in Microsoft Products
CVE-2026-121680

7.5HIGH

Key Information:

Vendor

Microsoft
Status
Windows 10 Version 1607
Windows 10 Version 1809
Windows 10 Version 21h2
Windows 10 Version 22h2
Vendor
CVE Published:
10 November 2026

What is CVE-2026-121680?

The Windows NTLM vulnerability exposes sensitive information, enabling unauthorized actors to execute spoofing attacks across a network. This type of exploit can allow attackers to gain unauthorized access to resources by impersonating legitimate users, potentially compromising the security of the affected systems.

Affected Version(s)

Windows 10 Version 1607 32-bit Systems 10.0.14393.0 < 10.0.14393.9688

Windows 10 Version 1809 32-bit Systems 10.0.17763.0 < 10.0.17763.9487

Windows 10 Version 21H2 32-bit Systems 10.0.19044.0 < 10.0.19044.7846

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.