Published Oct 13, 2026Sources checked Oct 21, 2026
6.8MEDIUMCVSS out of 10
What this means
Review the available evidence
CVE-2026-103578 and is rated Medium severity with a CVSS score of 6.8. 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 KB5127646.
Vendor-listed releases
10.0.28000.3231
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-2026-103578?
Untrusted pointer dereference in Windows Kernel allows an unauthorized attacker to elevate privileges with a physical attack.