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CVE-2026-42980

HighPublished

NT OS Kernel Elevation of Privilege Vulnerability

Published: Jun 9, 2026
Updated: Aug 25, 2026
Assigning CNA: microsoft
Evidence observed: Aug 6, 2026

Primary CVSS

7.8/ 10High

nvd · CVSS 3.1

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS probability estimate

6.9%

Low · next 30 days

Percentile: 93.9%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

Integer underflow (wrap or wraparound) in Windows NT OS Kernel allows an authorized attacker to elevate privileges locally.

Sources

CVE-2026-42980-POCExploit
Public exploit and research material for CVE-2026-42980, a Windows kernel WMI integer-underflow vulnerability enabling local privilege escalation to SYSTEM. Includes source code, build scripts, and bilingual write-ups for defensive research.

Responsible use

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