CVE intelligence

CVE-2026-70243

Vulnerability intelligence

Published Oct 13, 2026Sources checked Oct 21, 2026

7.0HIGHCVSS out of 10

What this means

Review the available evidence

CVE-2026-70243 and is rated High severity with a CVSS score of 7.0. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

What to do next

Remediation and response

Microsoft Security Response Center guidance

Vendor revision: Oct 13, 2026

Install KB5126646. Install KB5126653.

Vendor-listed releases

10.0.26100.33650
10.0.22631.7652

CISA KEVNot listedBased on the latest collected catalog

EPSS0.3%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-70243?

Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.

Source: NVD