Use After Free Vulnerability in Windows Audio Service by Microsoft
CVE-2026-121671

7HIGH

Key Information:

Vendor

Microsoft
Status
Windows 10 Version 21h2
Windows 10 Version 22h2
Windows 11 Version 23h2
Windows 11 Version 23h2
Vendor
CVE Published:
10 November 2026

What is CVE-2026-121671?

The vulnerability in Windows Audio Service involves a use after free condition, allowing an attacker with authorized access to elevate their local privileges. This flaw can potentially lead to unauthorized access to sensitive system resources, making it crucial for users and administrators to apply the necessary patches and updates from Microsoft to mitigate risks associated with this vulnerability.

Affected Version(s)

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

Windows 10 Version 22H2 32-bit Systems 10.0.19045.0 < 10.0.19045.7846

Windows 11 version 23H2 ARM64-based Systems 10.0.22631.0 < 10.0.22631.7711

References

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

CVSS V3.1

Score:
7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.