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CVE-2026-54989 Microsoft CVE debrief

CVE-2026-54989 is a high-severity vulnerability in the Quality Windows Audio/Video Experience (QWAVE) service, which allows an authorized attacker to elevate privileges locally. The vulnerability has a CVSS score of 7 and is classified as HIGH. It is caused by a use-after-free error. System administrators and users of Microsoft Windows operating systems should be aware of this vulnerability.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
HIGH 7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-14
Original CVE updated
2026-07-23
Advisory published
2026-07-14
Advisory updated
2026-07-23

Who should care

System administrators and users of Microsoft Windows operating systems should be aware of this vulnerability, as it can be exploited by an authorized attacker to gain elevated privileges. They should verify the affected systems and apply patches accordingly.

Technical summary

The vulnerability exists in the Quality Windows Audio/Video Experience (QWAVE) service and is caused by a use-after-free error. This allows an authorized attacker to elevate privileges locally. The CVSS vector for this vulnerability is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H. Affected systems should be identified and patched.

Defensive priority

High priority should be given to patching this vulnerability, as it can be exploited by an authorized attacker to gain elevated privileges.

Recommended defensive actions

  • Apply the patch provided by Microsoft
  • Ensure that all affected systems are updated with the latest security patches
  • Monitor system logs for potential exploitation attempts
  • Implement additional security measures, such as access controls and intrusion detection systems
  • Review compensating controls for exposed systems while remediation is scheduled and verified

Evidence notes

The CVE record was published on 2026-07-14T17:17:06.440Z and was last modified on 2026-07-20T13:53:09.553Z. The NVD entry is currently Analyzed. The vulnerability exists in the Quality Windows Audio/Video Experience (QWAVE) service. The CVSS vector for this vulnerability is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H. System administrators should verify the affected systems and apply patches accordingly.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-54989 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-54989

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

  • CVE-2026-54989 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-54989

    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.