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CVE-2026-50356 Microsoft CVE debrief

CVE-2026-50356 is a high-severity vulnerability in Microsoft Windows App Store 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 has released a patch for this vulnerability, and users are advised to apply it as soon as possible. This vulnerability is caused by improper synchronization in the Windows App Store, which can be exploited by an authorized attacker to gain elevated privileges. The CVE record was published on 2026-07-14T17:17:00.717Z and has not been modified since then. The NVD entry is currently Analyzed. Further verification is needed to confirm the affected scope and severity. System administrators and users of Microsoft Windows App Store should be aware of this vulnerability and take necessary precautions to prevent exploitation. It is recommended to review system logs for suspicious activity and implement additional security measures to prevent privilege escalation.

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 App Store should be aware of this vulnerability and take necessary precautions to prevent exploitation.

Technical summary

The vulnerability is caused by a race condition in Microsoft Windows App Store, which allows an authorized attacker to elevate privileges locally. The vulnerability has been assigned a CVSS score of 7 and is classified as HIGH. The CVSS vector is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

Defensive priority

High

Recommended defensive actions

  • Apply the patch released by Microsoft
  • Ensure that the Windows App Store is up-to-date
  • Monitor system logs for suspicious activity
  • Implement additional security measures to prevent privilege escalation

Evidence notes

The vulnerability is documented in the CVE record and the NVD detail page. Microsoft has released a patch for this vulnerability, which is available on their website. However, the exact details of the patch and the affected systems are not publicly available. Further verification is needed to confirm the affected scope and severity. The CVE record was published on 2026-07-14T17:17:00.717Z and has not been modified since then. The NVD entry is currently Analyzed. Additional review of system logs and monitoring is recommended to detect potential exploitation attempts.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-50356 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-50356

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

  • CVE-2026-50356 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-50356

    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.