CVE-2026-103578
Windows Kernel Elevation of Privilege Vulnerability
Microsoft Windows 11 version 26H1Operating systems
CVSS
6.8MediumExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.42%Chance of exploitation activity in the next 30 days, higher than 34% of CVEs. Scored 23 Oct 2026FIRST EPSS
What fixes it
- 10.0.28000.3231Windows 11 version 26H1CVE List
A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.
Vendor and government advisories 1
Vendors that say their products are affected, and agencies that issued alerts. Check each for the fixed release of the product you run.
Reports 1
1 outlet mention it. Reports are not confirmation; each links to its source.
Description
Untrusted pointer dereference in Windows Kernel allows an unauthorized attacker to elevate privileges with a physical attack.
Text from CVE List
Affected versions 1
- Windows 11 version 26H1affected: 10.0.28000.0 before 10.0.28000.3231CVE List