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CVE-2026-50378 Microsoft CVE debrief

CVE-2026-50378 is a HIGH severity vulnerability with a CVSS score of 7.8. It is a race condition in Windows Key Guard that allows an authorized attacker to elevate privileges locally. This vulnerability affects Windows Key Guard and has significant implications for system administrators and security teams. The vulnerability has a CVSS score of 7.8 and a severity of HIGH, indicating a high level of risk.

Vendor
Microsoft
Product
Windows 10 Version 1809
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 security teams responsible for Windows Key Guard should prioritize this vulnerability for patching. Additionally, operators and platform administrators who manage affected systems should be aware of the potential risks and take necessary precautions.

Technical summary

CVE-2026-50378 is a race condition vulnerability in Windows Key Guard. An authorized attacker can exploit this vulnerability to elevate privileges locally. The vulnerability has a CVSS score of 7.8 and a severity of HIGH. This vulnerability is particularly concerning for systems that utilize Windows Key Guard, as it could allow attackers to gain elevated access.

Defensive priority

High priority for patching due to the potential for privilege escalation

Recommended defensive actions

  • Apply the vendor patch
  • Verify and apply compensating controls
  • Monitor 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

Evidence is limited; primary official records indicate a race condition vulnerability in Windows Key Guard. Further verification is recommended. The CVE record was published on 2026-07-14T18:17:39.183Z and has not been modified since then. Additional review of system configurations and potential exposure is advised.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-50378 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-50378

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

  • CVE-2026-50378 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-50378

    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.