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CVE-2026-49794 Microsoft CVE debrief

CVE-2026-49794 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, including sensitive data such as audio content. 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 4.6
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-14
Original CVE updated
2026-07-22
Advisory published
2026-07-14
Advisory updated
2026-07-22

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.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-49794 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-49794

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

  • CVE-2026-49794 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-49794

    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.