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CVE-2026-42916 Microsoft CVE debrief

CVE-2026-42916 is a HIGH severity vulnerability in the Windows NT OS Kernel. An integer underflow (wrap or wraparound) allows an authorized attacker to elevate privileges locally. The vulnerability has a CVSS score of 7.8 and was published on [cvePublishedAt](https://www.cve.org/CVERecord?id=CVE-2026-42916).

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
HIGH 7.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-09
Original CVE updated
2026-06-11
Advisory published
2026-06-09
Advisory updated
2026-06-11

Who should care

Administrators and users of Windows operating systems should be aware of this vulnerability, as it can allow an authorized attacker to elevate privileges locally.

Technical summary

The vulnerability is caused by an integer underflow (wrap or wraparound) in the Windows NT OS Kernel. This weakness, classified as CWE-190, can be exploited by an authorized attacker to elevate privileges locally.

Defensive priority

HIGH

Recommended defensive actions

  • Apply patches or updates provided by Microsoft to vulnerable systems.
  • Ensure that all systems are running with the latest security updates and patches.
  • Monitor system logs for suspicious activity.

Evidence notes

The vulnerability affects multiple versions of Windows, including Windows 10, Windows 11, and Windows Server. A list of affected versions can be found in the [nvd](https://nvd.nist.gov/vuln/detail/CVE-2026-42916) details.

Official resources

CVE-2026-42916 was published on 2026-06-09T17:17:11.923Z and modified on 2026-06-11T19:53:30.230Z.