Microsoft Windows 11 26H1 vulnerabilities

CVE-2026-56190 [CRITICAL] CWE-908 CVE-2026-56190: Use of uninitialized resource in Windows RDP allows an unauthorized attacker to execute code over a Use of uninitialized resource in Windows RDP allows an unauthorized attacker to execute code over a network.

CVE-2026-49178 [HIGH] CWE-122 CVE-2026-49178: Heap-based buffer overflow in Active Directory Domain Services allows an authorized attacker to exec Heap-based buffer overflow in Active Directory Domain Services allows an authorized attacker to execute code over a network.

CVE-2026-83934 [HIGH] CWE-121 CVE-2026-83934: Stack-based buffer overflow in Windows GDI+ allows an unauthorized attacker to execute code over a n Stack-based buffer overflow in Windows GDI+ allows an unauthorized attacker to execute code over a network.

CVE-2026-49179 [HIGH] CWE-77 CVE-2026-49179: Improper neutralization of special elements used in a command ('command injection') in Windows Activ Improper neutralization of special elements used in a command ('command injection') in Windows Active Directory allows an unauthorized attacker to execute code over a network.

CVE-2026-50414 [HIGH] CWE-362 CVE-2026-50414: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Media allows an authorized attacker to elevate privileges over a network.

CVE-2026-97805 [CRITICAL] CWE-20 CVE-2026-97805: Out-of-bounds read in Windows Partition Management Driver allows an unauthorized attacker to execute Out-of-bounds read in Windows Partition Management Driver allows an unauthorized attacker to execute code over a network.

CVE-2026-72983 [CRITICAL] CWE-416 CVE-2026-72983: Use after free in Windows Internet Connection Sharing (ICS) allows an unauthorized attacker to execu Use after free in Windows Internet Connection Sharing (ICS) allows an unauthorized attacker to execute code over a network.

CVE-2026-50487 [CRITICAL] CWE-416 CVE-2026-50487: Use after free in Microsoft Windows DNS allows an unauthorized attacker to elevate privileges over a Use after free in Microsoft Windows DNS allows an unauthorized attacker to elevate privileges over a network.

CVE-2026-42904 [CRITICAL] CWE-122 CVE-2026-42904: Heap-based buffer overflow in Windows TCP/IP allows an unauthorized attacker to elevate privileges o Heap-based buffer overflow in Windows TCP/IP allows an unauthorized attacker to elevate privileges over an adjacent network.

CVE-2026-42985 [HIGH] CWE-416 CVE-2026-42985: Use after free in Remote Desktop Client allows an unauthorized attacker to execute code over a netwo Use after free in Remote Desktop Client allows an unauthorized attacker to execute code over a network.

CVE-2026-32225 [HIGH] CWE-693 CVE-2026-32225: Improper neutralization of special elements used in a command ('command injection') in Windows Shell Improper neutralization of special elements used in a command ('command injection') in Windows Shell allows an unauthorized attacker to bypass a security feature over a network.

CVE-2026-69461 [HIGH] CWE-121 CVE-2026-69461: Stack-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code over a n Stack-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code over a network.

CVE-2026-50505 [HIGH] CWE-416 CVE-2026-50505: Use after free in Windows Message Queuing allows an authorized attacker to execute code over a netwo Use after free in Windows Message Queuing allows an authorized attacker to execute code over a network.

CVE-2026-83928 [HIGH] CWE-306 CVE-2026-83928: Out-of-bounds write in Windows Local Security Authority Subsystem Service (LSASS) allows an unauthor Out-of-bounds write in Windows Local Security Authority Subsystem Service (LSASS) allows an unauthorized attacker to execute code over a network.

CVE-2026-105010 [CRITICAL] CWE-416 CVE-2026-105010: Use after free in Microsoft Windows Search Component allows an unauthorized attacker to elevate priv Use after free in Microsoft Windows Search Component allows an unauthorized attacker to elevate privileges over a network.

CVE-2026-49164 [CRITICAL] CWE-122 CVE-2026-49164: Heap-based buffer overflow in Active Directory Domain Services allows an unauthorized attacker to ex Heap-based buffer overflow in Active Directory Domain Services allows an unauthorized attacker to execute code over a network.

CVE-2026-50380 [CRITICAL] CWE-122 CVE-2026-50380: Heap-based buffer overflow in Windows GDI+ allows an unauthorized attacker to execute code over a ne Heap-based buffer overflow in Windows GDI+ allows an unauthorized attacker to execute code over a network.

CVE-2026-40369 [HIGH] CWE-822 CVE-2026-40369: Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges loc Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.

CVE-2026-100220 [HIGH] CWE-122 CVE-2026-100220: Heap-based buffer overflow in Windows Media Video Decoder allows an unauthorized attacker to execute Heap-based buffer overflow in Windows Media Video Decoder allows an unauthorized attacker to execute code over a network.

CVE-2026-83642 [HIGH] CWE-843 CVE-2026-83642: Access of resource using incompatible type ('type confusion') in DNS Server allows an unauthorized a Access of resource using incompatible type ('type confusion') in DNS Server allows an unauthorized attacker to execute code over a network.