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CVE-2026-50453 Microsoft CVE debrief

CVE-2026-50453 is an out-of-bounds read vulnerability in the Windows USB Audio Class driver (usbaudio.sys). An unauthorized attacker could exploit this vulnerability with a physical attack to disclose information. The vulnerability exists due to improper handling of audio data, allowing an attacker to read data out of bounds. This could potentially lead to information disclosure. System administrators and users of Windows operating systems should be aware of this vulnerability and take necessary precautions to protect their systems.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
MEDIUM 6.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-14
Original CVE updated
2026-07-21
Advisory published
2026-07-14
Advisory updated
2026-07-21

Who should care

System administrators and users of Windows operating systems should be aware of this vulnerability and take necessary precautions to protect their systems. This includes applying patches, monitoring system logs, and implementing additional security measures to prevent physical attacks.

Technical summary

The vulnerability exists in the Windows USB Audio Class driver (usbaudio.sys) and allows an attacker to read data out of bounds. This could potentially lead to information disclosure. The vulnerability is caused by a lack of proper bounds checking in the driver, allowing an attacker to access sensitive information. The CVSS score of 6.1 indicates a medium severity vulnerability.

Defensive priority

Medium priority due to the CVSS score of 6.1 and the potential for information disclosure.

Recommended defensive actions

  • Apply the patch provided by Microsoft
  • Ensure that all Windows operating systems are up-to-date
  • Monitor system logs for suspicious activity
  • Consider implementing additional security measures to prevent physical attacks
  • Review compensating controls for exposed systems while remediation is scheduled and verified

Evidence notes

The CVE record was published on 2026-07-14T18:17:50.120Z and last modified on 2026-07-21T16:41:26.710Z. The NVD entry is currently Analyzed. This information is based on the supplied source corpus. Further verification is recommended to confirm affected scope and severity.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-14T18:17:50.120Z and has not been modified since then. The NVD entry is currently Analyzed.