Heap-based Buffer Overflow in Windows NTFS by Microsoft
CVE-2026-20922

7.8HIGH

Key Information:

Vendor

Microsoft
Status
Windows Server 2022
Windows 10 Version 21h2
Windows Server 2019 (server Core Installation)
Windows Server 2025 (server Core Installation)
Vendor
CVE Published:
13 January 2026

What is CVE-2026-20922?

A heap-based buffer overflow vulnerability in Windows NTFS enables an authorized attacker to execute arbitrary code on the affected system. This could lead to unauthorized access and manipulation of system resources, putting the integrity and confidentiality of data at risk. Appropriate measures should be taken to mitigate this vulnerability by applying relevant updates and patches provided by Microsoft.

Affected Version(s)

Windows 10 Version 1607 32-bit Systems 10.0.14393.0 < 10.0.14393.8783

Windows 10 Version 1809 x64-based Systems 10.0.17763.0 < 10.0.17763.8276

Windows 10 Version 21H2 32-bit Systems 10.0.19044.0 < 10.0.19044.6809

References

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

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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