Heap-based Buffer Overflow in Windows Biometric Service by Microsoft
CVE-2026-83985

7.8HIGH

Key Information:

Vendor

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

What is CVE-2026-83985?

The Windows Biometric Service features a heap-based buffer overflow vulnerability that can be exploited by an authorized attacker to elevate privileges locally. This flaw highlights the importance of securing biometric data and ensuring that services managing such sensitive information are fortified against exploitation. To mitigate the risks associated with this vulnerability, Microsoft has recommended users apply the latest updates and patches.

Affected Version(s)

Windows 10 Version 1607 32-bit Systems 10.0.14393.0 < 10.0.14393.9512

Windows 10 Version 1809 32-bit Systems 10.0.17763.0 < 10.0.17763.9245

Windows 10 Version 21H2 32-bit Systems 10.0.19044.0 < 10.0.19044.7725

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

.