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CVE-2026-49806 Microsoft CVE debrief

CVE-2026-49806 is a high-severity vulnerability in the Windows USB Print Driver that allows an authorized attacker to elevate privileges locally due to a race condition. The vulnerability has a CVSS score of 7 and is classified as HIGH. Microsoft is the affected vendor. The vulnerability is caused by a concurrent execution using shared resource with improper synchronization, also known as a race condition, in the Windows USB Print Driver. This allows an authorized attacker to elevate privileges locally. System administrators and users of Windows operating systems should be aware of this vulnerability and take necessary precautions to mitigate the risk.

Vendor
Microsoft
Product
Windows 11 Version 24H2
CVSS
HIGH 7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-14
Original CVE updated
2026-07-16
Advisory published
2026-07-14
Advisory updated
2026-07-16

Who should care

System administrators and users of Windows operating systems should be aware of this vulnerability and take necessary precautions to mitigate the risk. This includes reviewing and updating Windows USB Print Driver configurations, monitoring system logs for suspicious activity, and applying the patch provided by Microsoft.

Technical summary

The vulnerability is caused by a concurrent execution using shared resource with improper synchronization, also known as a race condition, in the Windows USB Print Driver. This allows an authorized attacker to elevate privileges locally. The vulnerability has been analyzed and has a CVSS vector of CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H. The vulnerability affects Windows operating systems and has a high severity score of 7.

Defensive priority

High priority should be given to patching this vulnerability as it allows for local privilege escalation.

Recommended defensive actions

  • Apply the patch provided by Microsoft
  • Review and update Windows USB Print Driver configurations
  • Monitor system logs for suspicious activity
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record was published on 2026-07-14T17:16:57.173Z and was last modified on 2026-07-16T15:31:46.433Z. The NVD entry is currently Analyzed. The vulnerability affects Windows operating systems and has a high severity score of 7. The CVE record was analyzed based on information from Microsoft and other sources. However, the exact scope of affected systems and potential impact on various configurations is still being verified. Defenders should review the official CVE record and vendor advisories for more information.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-14T17:16:57.173Z and has not been modified since then. The NVD entry is currently Analyzed.