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Microsoft Windows 11 26H1 vulnerabilities

2,251 known vulnerabilities affecting microsoft/windows_11_26h1.

Total CVEs
2,251
CISA KEV
5
actively exploited
Public exploits
2
Exploited in wild
7
Severity breakdown
CRITICAL84HIGH1668MEDIUM495LOW4

Vulnerabilities

Page 39 of 113
CVE-2026-69576P3HIGHCVSS 7.8fixed in 10.0.28000.29542026-09-08
CVE-2026-69576 [HIGH] CWE-416 CVE-2026-69576: Use after free in Graphic Fonts allows an authorized attacker to elevate privileges locally. Use after free in Graphic Fonts allows an authorized attacker to elevate privileges locally.
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CVE-2026-69571P3HIGHCVSS 7.8fixed in 10.0.28000.29542026-09-08
CVE-2026-69571 [HIGH] CWE-122 CVE-2026-69571: Heap-based buffer overflow in Windows USB Audio Class driver (usbaudio.sys) allows an authorized att Heap-based buffer overflow in Windows USB Audio Class driver (usbaudio.sys) allows an authorized attacker to elevate privileges locally.
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CVE-2026-65775P3HIGHCVSS 7.8fixed in 10.0.28000.27042026-08-11
CVE-2026-65775 [HIGH] CWE-416 CVE-2026-65775: Use after free in Windows Win32K allows an authorized attacker to elevate privileges locally. Use after free in Windows Win32K allows an authorized attacker to elevate privileges locally.
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CVE-2026-62779P3HIGHCVSS 7.8fixed in 10.0.28000.27042026-08-11
CVE-2026-62779 [HIGH] CWE-416 CVE-2026-62779: Use after free in Windows Schannel allows an authorized attacker to elevate privileges locally. Use after free in Windows Schannel allows an authorized attacker to elevate privileges locally.
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CVE-2026-62707P3HIGHCVSS 7.8fixed in 10.0.28000.27042026-08-11
CVE-2026-62707 [HIGH] CWE-416 CVE-2026-62707: Use after free in Windows Modern Device Management (MDM) allows an authorized attacker to elevate pr Use after free in Windows Modern Device Management (MDM) allows an authorized attacker to elevate privileges locally.
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CVE-2026-62711P3HIGHCVSS 7.8fixed in 10.0.28000.27042026-08-11
CVE-2026-62711 [HIGH] CWE-416 CVE-2026-62711: Use after free in Windows Win32K allows an authorized attacker to elevate privileges locally. Use after free in Windows Win32K allows an authorized attacker to elevate privileges locally.
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CVE-2026-50436P3HIGHCVSS 7.8fixed in 10.0.28000.2269fixed in 10.0.28000.25252026-07-14
CVE-2026-50436 [HIGH] CWE-416 CVE-2026-50436: 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-2026-54114P3HIGHCVSS 7.8fixed in 10.0.28000.2269fixed in 10.0.28000.25252026-07-14
CVE-2026-54114 [HIGH] CWE-416 CVE-2026-54114: Use after free in Windows Win32K allows an authorized attacker to elevate privileges locally. Use after free in Windows Win32K allows an authorized attacker to elevate privileges locally.
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CVE-2026-50478P3HIGHCVSS 7.8fixed in 10.0.28000.2269fixed in 10.0.28000.25252026-07-14
CVE-2026-50478 [HIGH] CWE-416 CVE-2026-50478: 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-2026-50326P3HIGHCVSS 7.8fixed in 10.0.28000.2269fixed in 10.0.28000.25252026-07-14
CVE-2026-50326 [HIGH] CWE-416 CVE-2026-50326: Use after free in Windows Unified Consent System allows an authorized attacker to elevate privileges Use after free in Windows Unified Consent System allows an authorized attacker to elevate privileges locally.
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CVE-2026-50329P3HIGHCVSS 7.8fixed in 10.0.28000.2269fixed in 10.0.28000.25252026-07-14
CVE-2026-50329 [HIGH] CWE-416 CVE-2026-50329: 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-2026-58632P3HIGHCVSS 7.8fixed in 10.0.28000.22692026-07-14
CVE-2026-58632 [HIGH] CWE-416 CVE-2026-58632: Use after free in Windows Win32K allows an authorized attacker to elevate privileges locally. Use after free in Windows Win32K allows an authorized attacker to elevate privileges locally.
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CVE-2026-50687P3HIGHCVSS 7.8fixed in 10.0.28000.2269fixed in 10.0.28000.25252026-07-14
CVE-2026-50687 [HIGH] CWE-416 CVE-2026-50687: 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-2026-50306P3HIGHCVSS 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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Microsoft Windows 11 26H1 vulnerabilities | cvebase