Microsoft Windows 11 version 26H1 vulnerabilities

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-2026-83933 Medium · 5.5 CWE-59 Oct 13, 2026

Windows Update Orchestrator Service Information Disclosure Vulnerability

Improper link resolution before file access ('link following') in Windows Update Orchestrator Service allows an authorized attacker to disclose information locally.

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-2026-83924 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-2026-83923 High · 8.8 CWE-23 Oct 13, 2026

Microsoft OpenSSH for Windows Remote Code Execution Vulnerability

Relative path traversal in OpenSSH for Windows allows an unauthorized attacker to execute code over a network.

CVE-2026-83922 High · 7.8 CWE-416 Oct 13, 2026

Windows Direct Composition Elevation of Privilege Vulnerability

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

CVE-2026-83921 High · 7.0 CWE-122 Oct 13, 2026

Windows Search Service Elevation of Privilege Vulnerability

Heap-based buffer overflow in Microsoft Windows Search Component allows an authorized attacker to elevate privileges locally.

CVE-2026-83920 High · 7.8 CWE-122 Oct 13, 2026

Windows Search Service Elevation of Privilege Vulnerability

Heap-based buffer overflow in Microsoft Windows Search Component allows an authorized attacker to elevate privileges locally.

CVE-2026-83919 High · 7.8 CWE-122 Oct 13, 2026

Microsoft Internet Messaging API Remote Code Execution Vulnerability

Heap-based buffer overflow in Microsoft Internet Messaging API allows an authorized attacker to execute code locally.

CVE-2026-83918 High · 7.8 CWE-190 Oct 13, 2026

Windows Kernel Elevation of Privilege Vulnerability

Integer overflow or wraparound in Windows Kernel allows an authorized attacker to elevate privileges locally.