CVE-2026-103578: medium-severity vulnerability in Microsoft Windows 11 version 26H1
Windows Kernel Elevation of Privilege Vulnerability
Published · Updated
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.8epss 0.4%
exploitation probability
0.4%top 66% of all CVEs
observed exploitation
nono source reports it
Untrusted pointer dereference in Windows Kernel allows an unauthorized attacker to elevate privileges with a physical attack.
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Affected products
Microsoft · Windows 11 version 26H1Related CVEs — Microsoft Windows 11 version 26H1
In the same product, most dangerous first.
CVE-2026-21510HIGHWindows Shell Security Feature Bypass VulnerabilityEPSS 24.5%KEVCVE-2026-21513HIGHMSHTML Framework Security Feature Bypass VulnerabilityEPSS 15.9%KEVCVE-2026-32202MEDIUMWindows Shell Spoofing VulnerabilityEPSS 4.9%KEVCVE-2026-21525MEDIUMWindows Remote Access Connection Manager Denial of Service VulnerabilityEPSS 4.8%KEVCVE-2026-21533HIGHWindows Remote Desktop Services Elevation of Privilege VulnerabilityEPSS 4.1%KEVCVE-2026-21519HIGHDesktop Window Manager Elevation of Privilege VulnerabilityEPSS 2.5%KEV