Microsoft Security Response Center guidance
Release Notes
Overview
What is CVE-2026-94286?
An out-of-bounds read in libXtst's RECORD reply parser in libXtst before 1.2.6 could be used by malicious X servers to crash attached X clients.
CVE intelligence
CVE-2026-94286
Vulnerability intelligence
7.1HIGHCVSS out of 10
What this means
Review the available evidence
CVE-2026-94286 and is rated High severity with a CVSS score of 7.1. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.
Remediation and response
CISA KEVNot listedBased on the latest collected catalog
EPSS0.2%Estimated 30-day exploitation probability
Ransomware useNot markedCISA KEV ransomware field
Threat actors0Source-linked actor relationships