CVE-2026-50421: Windows Connected User Experiences and Telemetry Elevation of Privilege Vulnerability

highCVSS 7.8CVE-2026-50421

Access of resource using incompatible type ('type confusion') in Windows Connected User Experiences and Telemetry allows an authorized attacker to elevate privileges locally.

CSIRTS triage

vendor: Microsoft product: Windows Privilege escalation

What: Access of resource using incompatible type ('type confusion') in Windows Connected User Experiences and Telemetry allows an authorized attacker to elevate privileges locally.
Who is affected: Authorized users of Windows with the affected services.
Urgency: Remediation is high urgency due to the potential for local privilege escalation.
Action: Apply the latest security patch for Windows.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: high — CVSS 7.8
Published: 2026-07-14
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50421

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-504210.31% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 24% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-50421	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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