Microsoft Windows 11 26H1 vulnerabilities

CVE-2026-55000 [MEDIUM] CWE-416 CVE-2026-55000: Use after free in Windows USB Print Driver allows an unauthorized attacker to elevate privileges wit Use after free in Windows USB Print Driver allows an unauthorized attacker to elevate privileges with a physical attack.

CVE-2026-58543 [MEDIUM] CWE-362 CVE-2026-58543: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows USB Print Driver allows an authorized attacker to elevate privileges with a physical attack.

CVE-2026-23670 [MEDIUM] CWE-822 CVE-2026-23670: Untrusted pointer dereference in Windows Virtualization-Based Security (VBS) Enclave allows an autho Untrusted pointer dereference in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to bypass a security feature locally.

CVE-2026-35423 [MEDIUM] CWE-125 CVE-2026-35423: Out-of-bounds read in Telnet Client allows an unauthorized attacker to disclose information over a n Out-of-bounds read in Telnet Client allows an unauthorized attacker to disclose information over a network.

CVE-2026-45595 [MEDIUM] CWE-693 CVE-2026-45595: Protection mechanism failure in Windows Mark of the Web (MOTW) allows an unauthorized attacker to by Protection mechanism failure in Windows Mark of the Web (MOTW) allows an unauthorized attacker to bypass a security feature over a network.

CVE-2026-45608 [MEDIUM] CWE-125 CVE-2026-45608: Out-of-bounds read in Windows DHCP Client allows an unauthorized attacker to disclose information lo Out-of-bounds read in Windows DHCP Client allows an unauthorized attacker to disclose information locally.

CVE-2026-32088 [MEDIUM] CWE-362 CVE-2026-32088: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Biometric Service allows an unauthorized attacker to bypass a security feature with a physical attack.

CVE-2026-50475 [MEDIUM] CWE-126 CVE-2026-50475: Buffer over-read in Windows Kernel allows an authorized attacker to disclose information locally. Buffer over-read in Windows Kernel allows an authorized attacker to disclose information locally.

CVE-2026-50341 [MEDIUM] CWE-126 CVE-2026-50341: Buffer over-read in Windows NTFS allows an authorized attacker to disclose information locally. Buffer over-read in Windows NTFS allows an authorized attacker to disclose information locally.

CVE-2026-42914 [MEDIUM] CWE-125 CVE-2026-42914: Out-of-bounds read in Windows Kerberos allows an authorized attacker to deny service over a network. Out-of-bounds read in Windows Kerberos allows an authorized attacker to deny service over a network.

CVE-2026-40401 [HIGH] CWE-476 CVE-2026-40401: Null pointer dereference in Windows TCP/IP allows an unauthorized attacker to deny service locally. Null pointer dereference in Windows TCP/IP allows an unauthorized attacker to deny service locally.

CVE-2026-49807 [MEDIUM] CWE-200 CVE-2026-49807: Exposure of sensitive information to an unauthorized actor in Windows DirectX allows an unauthorized Exposure of sensitive information to an unauthorized actor in Windows DirectX allows an unauthorized attacker to disclose information locally.

CVE-2026-50294 [MEDIUM] CWE-497 CVE-2026-50294: Exposure of sensitive system information to an unauthorized control sphere in Windows Kernel allows Exposure of sensitive system information to an unauthorized control sphere in Windows Kernel allows an unauthorized attacker to disclose information locally.

CVE-2026-25180 [MEDIUM] CWE-125 CVE-2026-25180: Out-of-bounds read in Microsoft Graphics Component allows an unauthorized attacker to disclose infor Out-of-bounds read in Microsoft Graphics Component allows an unauthorized attacker to disclose information locally.

CVE-2026-25186 [MEDIUM] CWE-200 CVE-2026-25186: Exposure of sensitive information to an unauthorized actor in Windows Accessibility Infrastructure ( Exposure of sensitive information to an unauthorized actor in Windows Accessibility Infrastructure (ATBroker.exe) allows an authorized attacker to disclose information locally.

CVE-2026-42969 [MEDIUM] CWE-908 CVE-2026-42969: Use of uninitialized resource in Windows Push Notifications allows an authorized attacker to disclos Use of uninitialized resource in Windows Push Notifications allows an authorized attacker to disclose information locally.

CVE-2026-50690 [MEDIUM] CWE-908 CVE-2026-50690: Use of uninitialized resource in Windows SMB allows an authorized attacker to disclose information l Use of uninitialized resource in Windows SMB allows an authorized attacker to disclose information locally.

CVE-2026-20806 [MEDIUM] CWE-843 CVE-2026-20806: Access of resource using incompatible type ('type confusion') in Windows COM allows an authorized at Access of resource using incompatible type ('type confusion') in Windows COM allows an authorized attacker to disclose information locally.

CVE-2026-49180 [MEDIUM] CWE-59 CVE-2026-49180: Improper link resolution before file access ('link following') in Universal Plug and Play (upnp.dll) Improper link resolution before file access ('link following') in Universal Plug and Play (upnp.dll) allows an authorized attacker to disclose information locally.

CVE-2026-50383 [MEDIUM] CWE-126 CVE-2026-50383: Buffer over-read in Windows Print Spooler Components allows an authorized attacker to disclose infor Buffer over-read in Windows Print Spooler Components allows an authorized attacker to disclose information locally.