Microsoft Windows 11 23H2 vulnerabilities

CVE-2026-20825 [MEDIUM] CWE-284 CVE-2026-20825: Improper access control in Windows Hyper-V allows an authorized attacker to disclose information loc Improper access control in Windows Hyper-V allows an authorized attacker to disclose information locally.

CVE-2026-20819 [MEDIUM] CWE-822 CVE-2026-20819: 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 disclose information locally.

CVE-2026-20839 [MEDIUM] CWE-284 CVE-2026-20839: Improper access control in Windows Client-Side Caching (CSC) Service allows an authorized attacker t Improper access control in Windows Client-Side Caching (CSC) Service allows an authorized attacker to disclose information locally.

CVE-2026-20824 [MEDIUM] CWE-693 CVE-2026-20824: Protection mechanism failure in Windows Remote Assistance allows an unauthorized attacker to bypass Protection mechanism failure in Windows Remote Assistance allows an unauthorized attacker to bypass a security feature locally.

CVE-2026-20939 [MEDIUM] CWE-200 CVE-2026-20939: Exposure of sensitive information to an unauthorized actor in Windows File Explorer allows an author Exposure of sensitive information to an unauthorized actor in Windows File Explorer allows an authorized attacker to disclose information locally.

CVE-2026-21265 [MEDIUM] CWE-1329 CVE-2026-21265: Windows Secure Boot stores Microsoft certificates in the UEFI KEK and DB. These original certificate Windows Secure Boot stores Microsoft certificates in the UEFI KEK and DB. These original certificates are approaching expiration, and devices containing affected certificate versions must update them to maintain Secure Boot functionality and avoid compromising security by losing security fixes related to Windows boot manager or Secure Boot. The ope

CVE-2026-20847 [MEDIUM] CWE-200 CVE-2026-20847: Exposure of sensitive information to an unauthorized actor in Windows Shell allows an authorized att Exposure of sensitive information to an unauthorized actor in Windows Shell allows an authorized attacker to perform spoofing over a network.

CVE-2026-20829 [MEDIUM] CWE-125 CVE-2026-20829: Out-of-bounds read in Windows TPM allows an authorized attacker to disclose information locally. Out-of-bounds read in Windows TPM allows an authorized attacker to disclose information locally.

CVE-2026-20862 [MEDIUM] CWE-200 CVE-2026-20862: Exposure of sensitive information to an unauthorized actor in Windows Management Services allows an Exposure of sensitive information to an unauthorized actor in Windows Management Services allows an authorized attacker to disclose information locally.

CVE-2026-20962 [MEDIUM] CWE-908 CVE-2026-20962: Use of uninitialized resource in Dynamic Root of Trust for Measurement (DRTM) allows an authorized a Use of uninitialized resource in Dynamic Root of Trust for Measurement (DRTM) allows an authorized attacker to disclose information locally.

CVE-2026-20872 [MEDIUM] CWE-73 CVE-2026-20872: External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spo External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spoofing over a network.

CVE-2026-20821 [MEDIUM] CWE-200 CVE-2026-20821: Exposure of sensitive information to an unauthorized actor in Windows Remote Procedure Call allows a Exposure of sensitive information to an unauthorized actor in Windows Remote Procedure Call allows an unauthorized attacker to disclose information locally.

CVE-2026-20925 [MEDIUM] CWE-73 CVE-2026-20925: External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spo External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spoofing over a network.

CVE-2026-20936 [MEDIUM] CWE-125 CVE-2026-20936: Out-of-bounds read in Windows NDIS allows an authorized attacker to disclose information with a phys Out-of-bounds read in Windows NDIS allows an authorized attacker to disclose information with a physical attack.

CVE-2026-20834 [MEDIUM] CWE-36 CVE-2026-20834: Absolute path traversal in Windows Shell allows an unauthorized attacker to perform spoofing with a Absolute path traversal in Windows Shell allows an unauthorized attacker to perform spoofing with a physical attack.

CVE-2026-20838 [MEDIUM] CWE-209 CVE-2026-20838: Generation of error message containing sensitive information in Windows Kernel allows an authorized Generation of error message containing sensitive information in Windows Kernel allows an authorized attacker to disclose information locally.

CVE-2026-20935 [MEDIUM] CWE-822 CVE-2026-20935: Untrusted pointer dereference in Windows Virtualization-Based Security (VBS) Enclave allows an unaut Untrusted pointer dereference in Windows Virtualization-Based Security (VBS) Enclave allows an unauthorized attacker to disclose information locally.

CVE-2026-20823 [MEDIUM] CWE-200 CVE-2026-20823: Exposure of sensitive information to an unauthorized actor in Windows File Explorer allows an author Exposure of sensitive information to an unauthorized actor in Windows File Explorer allows an authorized attacker to disclose information locally.

CVE-2026-20827 [MEDIUM] CWE-200 CVE-2026-20827: Exposure of sensitive information to an unauthorized actor in Tablet Windows User Interface (TWINUI) Exposure of sensitive information to an unauthorized actor in Tablet Windows User Interface (TWINUI) Subsystem allows an authorized attacker to disclose information locally.

CVE-2026-20828 [MEDIUM] CWE-125 CVE-2026-20828: Out-of-bounds read in Windows Internet Connection Sharing (ICS) allows an unauthorized attacker to d Out-of-bounds read in Windows Internet Connection Sharing (ICS) allows an unauthorized attacker to disclose information with a physical attack.