Overview
What is CVE-2026-78455?
Out-of-bounds read in Xbox allows an unauthorized attacker to disclose information with a physical attack.
CVE intelligence
CVE-2026-78455
Vulnerability intelligence
4.3MEDIUMCVSS out of 10
What this means
Review the available evidence
CVE-2026-78455 and is rated Medium severity with a CVSS score of 4.3. 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
EPSS0.5%Estimated 30-day exploitation probability
Ransomware useNot markedCISA KEV ransomware field
Threat actors0Source-linked actor relationships