CVE-2026-49794 Microsoft CVE debrief

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 reviewing system configurations, applying vendor patches, and monitoring system logs for suspicious activity. Additionally, organizations should ensure physical security measures are in place to prevent unauthorized access to systems.

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, including sensitive data such as audio content. The vulnerability is due to improper handling of audio data, which can be exploited by an unauthorized attacker with a physical attack. The impact of this vulnerability is medium, as it requires a physical attack and can result in information disclosure.

Defensive priority

Medium priority due to the physical attack requirement and information disclosure impact.

Recommended defensive actions

• Apply the vendor patch from Microsoft
• Ensure physical security measures are in place to prevent unauthorized access to systems
• Monitor system logs for suspicious activity
• Consider implementing compensating controls such as USB device restrictions
• Review system configurations to ensure secure audio device handling

Evidence notes

The CVE record was published on 2026-07-14T17:16:55.203Z and last modified on 2026-07-16T15:59:58.327Z. The NVD entry is currently Analyzed. This information is based on the supplied source corpus and may not reflect the full scope of the vulnerability. Further verification is recommended to ensure accurate understanding of the vulnerability's impact.

Official resources