CVE intelligence

CVE-2026-42915

Vulnerability intelligence

Published Jun 9, 2026Sources checked Sep 28, 2026

5.5MEDIUMCVSS out of 10

What this means

Review the available evidence

CVE-2026-42915 and is rated Medium severity with a CVSS score of 5.5. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

CISA KEVNot listedBased on the latest collected catalog

EPSS0.4%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-42915?

Incorrect calculation of buffer size in Windows VMSwitch allows an authorized attacker to deny service locally.