Microsoft Windows 11 26h2 vulnerabilities

CVE-2026-84020 High · 7.0 CWE-416 Oct 13, 2026

Windows Routing and Remote Access Service (RRAS) Elevation of Privilege Vulnerability

Use after free in Windows Routing and Remote Access Service (RRAS) allows an authorized attacker to elevate privileges locally.

CVE-2026-84019 High · 7.0 CWE-416 Oct 13, 2026

Windows Advanced Rasterization Platform Elevation of Privilege Vulnerability

Use after free in Windows Advanced Rasterization Platform allows an authorized attacker to elevate privileges locally.

CVE-2026-84018 High · 7.0 CWE-367 Oct 13, 2026

Windows Print Spooler Components Elevation of Privilege Vulnerability

Use after free in Windows Print Spooler Components allows an authorized attacker to elevate privileges locally.

CVE-2026-84017 High · 7.5 CWE-476 Oct 13, 2026

Windows Routing and Remote Access Service (RRAS) Denial of Service Vulnerability

Null pointer dereference in Windows Routing and Remote Access Service (RRAS) allows an unauthorized attacker to deny service over a network.

CVE-2026-84016 High · 7.8 CWE-787 Oct 13, 2026

Windows EAPHost Service Elevation of Privilege Vulnerability

Out-of-bounds write in Windows EAPHost Service allows an authorized attacker to elevate privileges locally.

CVE-2026-84015 Critical · 9.8 CWE-122 Oct 13, 2026

Remote Access Point-to-Point Protocol (PPP) EAP-TLS Remote Code Execution Vulnerability

Heap-based buffer overflow in Remote Access Point-to-Point Protocol (PPP) EAP-TLS allows an unauthorized attacker to execute code over a network.

CVE-2026-84014 High · 7.0 CWE-122 Oct 13, 2026

Windows Device Association Service Elevation of Privilege Vulnerability

Heap-based buffer overflow in Windows Device Association Service allows an authorized attacker to elevate privileges locally.

CVE-2026-84013 High · 7.8 CWE-416 Oct 13, 2026

Windows Telephony Server Elevation of Privilege Vulnerability

Use after free in Windows Telephony Server allows an authorized attacker to elevate privileges locally.

CVE-2026-84011 Medium · 5.5 CWE-863 Oct 13, 2026

Windows SMB Client Security Feature Bypass Vulnerability

Incorrect authorization in Windows SMB Client allows an authorized attacker to bypass a security feature locally.

CVE-2026-84009 Medium · 4.7 CWE-367 Oct 13, 2026

Windows Projected File System Tampering Vulnerability

Time-of-check time-of-use (toctou) race condition in Windows Projected File System allows an authorized attacker to perform tampering locally.

CVE-2026-83935 Critical · 9.8 CWE-122 Oct 13, 2026

Microsoft XML Remote Code Execution Vulnerability

Heap-based buffer overflow in Microsoft XML allows an unauthorized attacker to execute code over a network.

CVE-2026-83934 High · 8.8 CWE-121 Oct 13, 2026

Windows GDI+ Remote Code Execution Vulnerability

Stack-based buffer overflow in Windows GDI+ allows an unauthorized attacker to execute code over a network.

CVE-2026-83932 High · 7.8 CWE-122 Oct 13, 2026

Windows Group Policy Elevation of Privilege Vulnerability

Heap-based buffer overflow in Windows Group Policy allows an authorized attacker to elevate privileges locally.

CVE-2026-83931 High · 7.8 CWE-122 Oct 13, 2026

Windows Hyper-V Remote Code Execution Vulnerability

Heap-based buffer overflow in Windows Hyper-V allows an authorized attacker to execute code locally.

CVE-2026-83930 High · 7.0 CWE-416 Oct 13, 2026

Windows Update Orchestrator Service Elevation of Privilege Vulnerability

Use after free in Windows Update Orchestrator Service allows an authorized attacker to elevate privileges locally.

CVE-2026-83929 High · 8.8 CWE-787 Oct 13, 2026

Windows GDI Remote Code Execution Vulnerability

Out-of-bounds write in Windows GDI allows an unauthorized attacker to execute code over a network.

CVE-2026-83928 High · 8.8 CWE-306 Oct 13, 2026

Windows Local Security Authority Subsystem Service (LSASS) Remote Code Execution Vulnerability

Out-of-bounds write in Windows Local Security Authority Subsystem Service (LSASS) allows an unauthorized attacker to execute code over a network.

CVE-2026-83927 High · 7.8 CWE-59 Oct 13, 2026

Windows Registry Elevation of Privilege Vulnerability

Improper link resolution before file access ('link following') in Windows Registry allows an authorized attacker to elevate privileges locally.

CVE-2026-83926 Medium · 4.4 CWE-295 Oct 13, 2026

Windows Hello Security Feature Bypass Vulnerability

Improper certificate validation in Windows Hello allows an authorized attacker to bypass a security feature locally.

CVE-2026-83925 Medium · 4.7 CWE-497 Oct 13, 2026

Windows Kernel Information Disclosure Vulnerability

Use of uninitialized resource in Windows Kernel allows an authorized attacker to disclose information locally.

CVE-2026-83924 High · 7.0 CWE-416 Oct 13, 2026

Windows Kernel Elevation of Privilege Vulnerability

Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.

CVE-2026-83900 High · 7.0 CWE-416 Oct 13, 2026

Windows Bind Filter Driver Elevation of Privilege Vulnerability

Use after free in Windows Bind Filter Driver allows an authorized attacker to elevate privileges locally.

CVE-2026-83899 High · 7.0 CWE-362 Oct 13, 2026

Windows Installer Elevation of Privilege Vulnerability

Improper privilege management in Windows Installer allows an authorized attacker to elevate privileges locally.

CVE-2026-83897 Medium · 4.7 CWE-497 Oct 13, 2026

Windows Win32 Kernel Subsystem Information Disclosure Vulnerability

Exposure of sensitive system information to an unauthorized control sphere in Windows Win32 Kernel Subsystem allows an authorized attacker to disclose information locally.

CVE-2026-83896 High · 7.8 CWE-122 Oct 13, 2026

Windows Direct Composition Elevation of Privilege Vulnerability

Heap-based buffer overflow in Windows Direct Composition allows an authorized attacker to elevate privileges locally.