HIGH

CVE-2026-42980

NT OS Kernel Elevation of Privilege Vulnerability

CVSS v3

7.8

HIGH

EPSS Score

5.7 %

exploit probability

CISA KEV

known exploited

Exploitation

none

SSVC status

Description

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

Technical details

CVSS v3 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Published: 2026-06-19
Last Modified: 2026-07-29
MSRC Title: NT OS Kernel Elevation of Privilege Vulnerability

Frequently asked questions

What is CVE-2026-42980?

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

Is CVE-2026-42980 actively exploited?

Active exploitation of CVE-2026-42980 has not been confirmed. The EPSS score is 5.7%, indicating the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-42980?

CVE-2026-42980 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C.

Is CVE-2026-42980 affecting your environment?

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