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CVE-2026-50363 Microsoft CVE debrief

A high-severity vulnerability, CVE-2026-50363, was found in Windows Push Notifications, which could allow an authorized attacker to elevate privileges locally. This heap-based buffer overflow vulnerability has a CVSS score of 7.8 and is considered HIGH severity. Microsoft has released a patch for this vulnerability. The vulnerability affects Windows operating systems and has been assigned a CVSS vector of CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. 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
HIGH 7.8
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 vulnerability affects Windows operating systems and has a high CVSS score, indicating a high severity vulnerability. Operators, platform administrators, and security teams should review the official advisory and CVE record to validate affected scope, severity, and vendor guidance.

Technical summary

CVE-2026-50363 is a heap-based buffer overflow vulnerability in Windows Push Notifications. An authorized attacker could exploit this vulnerability to elevate privileges locally. The vulnerability has a CVSS score of 7.8 and is considered HIGH severity. The CVSS vector is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. Microsoft has released a patch for this vulnerability.

Defensive priority

High

Recommended defensive actions

  • Apply the patch released by Microsoft
  • Ensure that Windows operating systems are up-to-date
  • Monitor system logs for suspicious activity
  • Implement additional security measures to prevent local privilege escalation
  • Review compensating controls for exposed systems while remediation is scheduled and verified

Evidence notes

The CVE record was published on 2026-07-14T18:17:36.737Z and was last modified on 2026-07-20T15:05:57.860Z. The NVD entry is currently Analyzed. The vulnerability affects Windows Push Notifications and has a CVSS score of 7.8. The CVSS vector is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. Microsoft has released a patch for this vulnerability. However, the exact impact and affected scope are still being verified. Defenders should review the official advisory and CVE record to validate affected scope, severity, and vendor guidance.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-50363 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-50363

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

  • CVE-2026-50363 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-50363

    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.