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Multiple Elevation of Privilege Vulnerabilities in Windows USB Audio Driver

First seen 8 Sep 2026, 19:20 UTC • •

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ThreatCluster AI
ThreatCluster •September 9, 2026 at 19:14 UTC
  • •Eight critical vulnerabilities in Windows USB Audio Class driver disclosed on September 8, 2026.
  • •Attackers can gain SYSTEM privileges through local exploitation methods.
  • •No active exploitation reported, but high attack complexity requires advanced knowledge.

On September 8, 2026, Microsoft disclosed eight critical vulnerabilities in the Windows USB Audio Class driver (usbaudio.sys), all allowing local elevation of privilege. The CVEs include CVE-2026-69270, CVE-2026-69307, CVE-2026-69469, CVE-2026-69413, CVE-2026-69571, CVE-2026-69687, CVE-2026-69707, and CVE-2026-69859. Attackers with local access can exploit these vulnerabilities to gain SYSTEM privileges through various methods, including heap-based buffer overflows and race conditions. The vulnerabilities are rated with high attack complexity, indicating that successful exploitation requires advanced knowledge of the system. The scope of impact includes all systems running affected versions of Windows that utilize the USB Audio Class driver. As of now, there are no reports of active exploitation in the wild, but the vulnerabilities are critical and should be addressed promptly.

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Timeline

2026-09-08
Multiple CVEs published
Microsoft disclosed eight vulnerabilities in Windows USB Audio Class driver, allowing local elevation of privilege.
Api.Msrc.Microsoft
2026-09-08
CVE-2026-69270 published
Heap-based buffer overflow vulnerability allows authorized attackers to elevate privileges locally.
Api.Msrc.Microsoft
2026-09-08
CVE-2026-69307 published
Another heap-based buffer overflow vulnerability in the same driver, enabling local privilege escalation.
Api.Msrc.Microsoft
2026-09-08
CVE-2026-69469 published
Integer overflow vulnerability allows unauthorized attackers to elevate privileges with physical access.
Api.Msrc.Microsoft
2026-09-08
CVE-2026-69413 published
Use after free vulnerability in the driver allows local privilege escalation for authorized attackers.
Api.Msrc.Microsoft
2026-09-08
CVE-2026-69571 published
Heap-based buffer overflow vulnerability allows local privilege escalation for authorized attackers.
Api.Msrc.Microsoft
2026-09-08
CVE-2026-69687 published
Integer underflow vulnerability allows local privilege escalation for authorized attackers.
Api.Msrc.Microsoft
2026-09-08
CVE-2026-69707 published
Integer overflow vulnerability allows local privilege escalation for authorized attackers.
Api.Msrc.Microsoft
2026-09-08
CVE-2026-69859 published
Time-of-check time-of-use race condition vulnerability allows local privilege escalation for authorized attackers.
Api.Msrc.Microsoft

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