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CVE-2026-50670 Microsoft CVE debrief

CVE-2026-50670 is a high-severity vulnerability in Windows Kernel that allows an authorized attacker to elevate privileges locally. The vulnerability has a CVSS score of 8.8 and is classified as HIGH. Microsoft has released a patch for this vulnerability. The vulnerability is an out-of-bounds read in Windows Kernel, which can be exploited by an authorized attacker to gain elevated privileges. System administrators and security teams should prioritize patching this vulnerability to prevent potential privilege escalation attacks.

Vendor
Microsoft
Product
Windows 10 Version 1809
CVSS
HIGH 8.8
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 security teams responsible for Windows Kernel systems should prioritize patching this vulnerability to prevent potential privilege escalation attacks. This includes teams managing Windows 10, Windows 11, and Windows Server environments. Vulnerability management and security teams should review system configurations and ensure proper security controls are in place.

Technical summary

The vulnerability is an out-of-bounds read in Windows Kernel, which allows an authorized attacker to elevate privileges locally. The CVSS vector for this vulnerability is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H. The vulnerability affects multiple versions of Windows, including Windows 10, Windows 11, and Windows Server. However, specific details about the impact on each version are limited.

Defensive priority

High

Recommended defensive actions

  • Apply the patch released by Microsoft
  • Review and update system configurations to ensure proper security controls are in place
  • Monitor system logs for potential exploitation attempts
  • 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 2026-07-14T18:18:01.063Z and was last modified on 2026-07-16T20:01:27.173Z. The NVD entry is currently Analyzed. The vulnerability affects multiple versions of Windows, including Windows 10, Windows 11, and Windows Server. However, specific details about the impact on each version are limited. Defenders should verify the affected scope and review system configurations to ensure proper security controls are in place.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-50670 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-50670

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

  • CVE-2026-50670 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-50670

    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.