PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-69307 Microsoft CVE debrief

A heap-based buffer overflow vulnerability exists in the Windows USB Audio Class driver (usbaudio.sys), allowing authorized attackers to elevate privileges locally. This vulnerability has a CVSS score of 7.8 and is classified as HIGH severity. The vulnerability can be exploited by an authorized attacker, potentially leading to further exploitation and compromise of the system. Defenders should prioritize patching this vulnerability, especially for systems with exposed USB Audio Class drivers.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
HIGH 7.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-08
Original CVE updated
2026-09-16
Advisory published
2026-09-08
Advisory updated
2026-09-16

Who should care

Defenders responsible for Windows systems with exposed USB Audio Class drivers should prioritize patching this vulnerability. This includes administrators and security teams managing Windows systems, as well as operators responsible for ensuring the security of these systems. Patching is required to prevent exploitation and potential compromise of the system.

Why it matters

This vulnerability allows an authorized attacker to elevate privileges locally, which can lead to further exploitation and compromise of the system.

  • Local privilege escalation is possible
  • Patching is required to prevent exploitation
  • Systems with exposed USB Audio Class drivers are vulnerable

Technical summary

The vulnerability exists in the Windows USB Audio Class driver (usbaudio.sys) and allows an authorized attacker to elevate privileges locally. The vulnerability has a CVSS score of 7.8 and is classified as HIGH severity. The vulnerability can be exploited through a heap-based buffer overflow, which can be triggered by a specially crafted input. Defenders should prioritize patching this vulnerability, especially for systems with exposed USB Audio Class drivers.

Defensive priority

Defenders should prioritize patching this vulnerability, especially for systems with exposed USB Audio Class drivers.

Recommended defensive actions

  • Apply the patch provided by Microsoft
  • Verify that the patch has been applied successfully
  • Monitor systems for potential exploitation attempts

Evidence notes

The vulnerability is described in the CVE Program record and the NVD vulnerability detail page. Microsoft has provided a patch and vendor advisory for this vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-69307 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-69307

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-69307 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-69307

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.