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Microsoft Windows 11 26H1 vulnerabilities

2,082 known vulnerabilities affecting microsoft/windows_11_26h1.

Total CVEs
2,082
CISA KEV
5
actively exploited
Public exploits
2
Exploited in wild
7
Severity breakdown
CRITICAL78HIGH1543MEDIUM457LOW4

Vulnerabilities

Page 37 of 105
CVE-2026-50306P3HIGHCVSS 7.8fixed in 10.0.28000.2269fixed in 10.0.28000.25252026-07-14
CVE-2026-50306 [HIGH] CWE-190 CVE-2026-50306: Use after free in Windows TCP/IP allows an authorized attacker to elevate privileges locally. Use after free in Windows TCP/IP allows an authorized attacker to elevate privileges locally.
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CVE-2026-49173P3HIGHCVSS 7.8fixed in 10.0.28000.2269fixed in 10.0.28000.25252026-07-14
CVE-2026-49173 [HIGH] CWE-416 CVE-2026-49173: Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally. Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.
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CVE-2026-56643P3HIGHCVSS 7.8fixed in 10.0.28000.25252026-07-14
CVE-2026-56643 [HIGH] CWE-416 CVE-2026-56643: Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally. Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.
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CVE-2026-50353P3HIGHCVSS 7.8fixed in 10.0.28000.2269fixed in 10.0.28000.25252026-07-14
CVE-2026-50353 [HIGH] CWE-416 CVE-2026-50353: Use after free in Windows DirectX allows an authorized attacker to elevate privileges locally. Use after free in Windows DirectX allows an authorized attacker to elevate privileges locally.
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CVE-2026-56644P3HIGHCVSS 7.8fixed in 10.0.28000.25252026-07-14
CVE-2026-56644 [HIGH] CWE-416 CVE-2026-56644: Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally. Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.
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CVE-2026-40399P3HIGHCVSS 7.8fixed in 10.0.28000.21132026-05-12
CVE-2026-40399 [HIGH] CWE-121 CVE-2026-40399: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows TCP/IP allows an authorized attacker to elevate privileges locally.
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CVE-2026-34343P3HIGHCVSS 7.8fixed in 10.0.28000.21132026-05-12
CVE-2026-34343 [HIGH] CWE-122 CVE-2026-34343: Heap-based buffer overflow in Windows Application Identity (AppID) Subsystem allows an authorized at Heap-based buffer overflow in Windows Application Identity (AppID) Subsystem allows an authorized attacker to elevate privileges locally.
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CVE-2026-58635P3HIGHCVSS 7.8fixed in 10.0.28000.2269fixed in 10.0.28000.25252026-07-14
CVE-2026-58635 [HIGH] CWE-77 CVE-2026-58635: Improper neutralization of special elements used in a command ('command injection') in Windows Narra Improper neutralization of special elements used in a command ('command injection') in Windows Narrator Braille allows an authorized attacker to elevate privileges locally.
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CVE-2026-85836P3HIGHCVSS 7.8fixed in 10.0.28000.32312026-10-13
CVE-2026-85836 [HIGH] CWE-416 CVE-2026-85836: Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally. Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.
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CVE-2026-96308P3HIGHCVSS 7.8fixed in 10.0.28000.32312026-10-13
CVE-2026-96308 [HIGH] CWE-416 CVE-2026-96308: Use after free in Windows Installer allows an authorized attacker to elevate privileges locally. Use after free in Windows Installer allows an authorized attacker to elevate privileges locally.
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CVE-2026-84013P3HIGHCVSS 7.8fixed in 10.0.28000.32312026-10-13
CVE-2026-84013 [HIGH] CWE-416 CVE-2026-84013: Use after free in Windows Telephony Server allows an authorized attacker to elevate privileges local Use after free in Windows Telephony Server allows an authorized attacker to elevate privileges locally.
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CVE-2026-96309P3HIGHCVSS 7.8fixed in 10.0.28000.32312026-10-13
CVE-2026-96309 [HIGH] CWE-416 CVE-2026-96309: Use after free in Windows Subsystem for Linux allows an authorized attacker to elevate privileges lo Use after free in Windows Subsystem for Linux allows an authorized attacker to elevate privileges locally.
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CVE-2026-96223P3HIGHCVSS 7.8fixed in 10.0.28000.32312026-10-13
CVE-2026-96223 [HIGH] CWE-416 CVE-2026-96223: Use after free in Windows Hyper-V allows an authorized attacker to elevate privileges locally. Use after free in Windows Hyper-V allows an authorized attacker to elevate privileges locally.
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CVE-2026-45641P3HIGHCVSS 7.8fixed in 10.0.28000.22692026-06-09
CVE-2026-45641 [HIGH] CWE-843 CVE-2026-45641: Access of resource using incompatible type ('type confusion') in Windows Hyper-V allows an unauthori Access of resource using incompatible type ('type confusion') in Windows Hyper-V allows an unauthorized attacker to execute code locally.
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CVE-2026-49170P3HIGHCVSS 7.8fixed in 10.0.28000.2269fixed in 10.0.28000.25252026-07-14
CVE-2026-49170 [HIGH] CWE-285 CVE-2026-49170: Insufficient granularity of access control in Windows StateRepository API allows an authorized attac Insufficient granularity of access control in Windows StateRepository API allows an authorized attacker to elevate privileges locally.
nvd
CVE-2026-34333P3HIGHCVSS 7.8fixed in 10.0.28000.21132026-05-12
CVE-2026-34333 [HIGH] CWE-190 CVE-2026-34333: Use after free in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally. Use after free in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.
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CVE-2026-50688P3HIGHCVSS 7.8fixed in 10.0.28000.25252026-07-14
CVE-2026-50688 [HIGH] CWE-416 CVE-2026-50688: Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally. Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.
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CVE-2026-50490P3HIGHCVSS 7.8fixed in 10.0.28000.2269fixed in 10.0.28000.25252026-07-14
CVE-2026-50490 [HIGH] CWE-416 CVE-2026-50490: Use after free in Windows Installer allows an authorized attacker to elevate privileges locally. Use after free in Windows Installer allows an authorized attacker to elevate privileges locally.
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CVE-2026-54129P3HIGHCVSS 7.8fixed in 10.0.28000.2269fixed in 10.0.28000.25252026-07-14
CVE-2026-54129 [HIGH] CWE-416 CVE-2026-54129: Use after free in Windows Hyper-V allows an authorized attacker to elevate privileges locally. Use after free in Windows Hyper-V allows an authorized attacker to elevate privileges locally.
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CVE-2026-50307P3HIGHCVSS 7.8fixed in 10.0.28000.2269fixed in 10.0.28000.25252026-07-14
CVE-2026-50307 [HIGH] CWE-416 CVE-2026-50307: Use after free in Windows TCP/IP allows an authorized attacker to elevate privileges locally. Use after free in Windows TCP/IP allows an authorized attacker to elevate privileges locally.
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Microsoft Windows 11 26H1 vulnerabilities | cvebase