Microsoft Windows 11 23h2
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By the Year
In 2026 there have been 428 vulnerabilities in Microsoft Windows 11 23h2 with an average score of 7.2 out of ten. Last year, in 2025 Windows 11 23h2 had 663 security vulnerabilities published. If vulnerabilities keep coming in at the current rate, it appears that number of security vulnerabilities in Windows 11 23h2 in 2026 could surpass last years number. However, the average CVE base score of the vulnerabilities in 2026 is greater by 0.04.
| Year | Vulnerabilities | Average Score |
|---|---|---|
| 2026 | 428 | 7.25 |
| 2025 | 663 | 7.21 |
| 2024 | 541 | 7.35 |
| 2023 | 49 | 7.70 |
| 2022 | 0 | 0.00 |
| 2021 | 0 | 0.00 |
| 2020 | 1 | 7.00 |
It may take a day or so for new Windows 11 23h2 vulnerabilities to show up in the stats or in the list of recent security vulnerabilities. Additionally vulnerabilities may be tagged under a different product or component name.
Recent Microsoft Windows 11 23h2 Security Vulnerabilities
Jul 2026: DirectX Graphics Kernel Elevation of Privilege Vulnerability
CVE-2026-58629
7 - High
- July 14, 2026
Use after free in Windows DirectX allows an authorized attacker to elevate privileges locally.
Dangling pointer
Jul 2026: Windows WebView Elevation of Privilege Vulnerability
CVE-2026-56173
7 - High
- July 14, 2026
Use after free in Windows WebView allows an authorized attacker to elevate privileges locally.
Dangling pointer
Jul 2026: Windows NTFS Remote Code Execution Vulnerability
CVE-2026-50471
7.8 - High
- July 14, 2026
Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code locally.
Heap-based Buffer Overflow
Jul 2026: Windows Push Notifications Elevation of Privilege Vulnerability
CVE-2026-44800
7.8 - High
- July 14, 2026
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Push Notifications allows an authorized attacker to elevate privileges locally.
Race Condition
Jul 2026: Windows Local Security Authority Subsystem Service (LSASS) Denial of Service Vulnerability
CVE-2026-40378
7.5 - High
- July 14, 2026
Memory allocation with excessive size value in Windows Local Security Authority Subsystem Service (LSASS) allows an unauthorized attacker to deny service over a network.
Stack Exhaustion
Jul 2026: Windows Event Logging Service Information Disclosure Vulnerability
CVE-2026-34348
6.5 - Medium
- July 14, 2026
Protection mechanism failure in Windows Event Logging Service allows an authorized attacker to disclose information over a network.
Protection Mechanism Failure
Jul 2026: Windows Audio Service Information Disclosure Vulnerability
CVE-2026-34328
5.5 - Medium
- July 14, 2026
Exposure of sensitive information to an unauthorized actor in Windows Audio Service allows an authorized attacker to disclose information locally.
Information Disclosure
Jul 2026: Windows File Explorer Information Disclosure Vulnerability
CVE-2026-33842
5.5 - Medium
- July 14, 2026
Exposure of sensitive information to an unauthorized actor in Windows File Explorer allows an authorized attacker to disclose information locally.
Information Disclosure
Jul 2026: Windows NTFS Remote Code Execution Vulnerability
CVE-2026-58640
7.3 - High
- July 14, 2026
Heap-based buffer overflow in Windows NTFS allows an authorized attacker to execute code locally.
Heap-based Buffer Overflow
Jul 2026: Virtual Hard Disk (VHD) Miniport Driver Elevation of Privilege Vulernability
CVE-2026-58601
7.8 - High
- July 14, 2026
Heap-based buffer overflow in Virtual Hard Disk (VHD) Miniport Driver allows an authorized attacker to elevate privileges locally.
Heap-based Buffer Overflow
Jul 2026: Windows FTP Service Remote Code Execution Vulnerability
CVE-2026-49172
9.8 - Critical
- July 14, 2026
Heap-based buffer overflow in Windows FTP Service allows an unauthorized attacker to execute code over a network.
Heap-based Buffer Overflow
Jul 2026: Windows App Package Installer Elevation of Privilege Vulnerability
CVE-2026-48572
7 - High
- July 14, 2026
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows App Installer allows an authorized attacker to elevate privileges locally.
Race Condition
Jul 2026: Windows App Package Installer Elevation of Privilege Vulnerability
CVE-2026-48571
7 - High
- July 14, 2026
Use after free in Windows App Installer allows an authorized attacker to elevate privileges locally.
Dangling pointer
Jul 2026: SQL Server ODBC driver Elevation of Privilege Vulnerability
CVE-2026-42990
9.8 - Critical
- July 14, 2026
Heap-based buffer overflow in SQL Server ODBC driver allows an unauthorized attacker to execute code over a network.
Heap-based Buffer Overflow
Jul 2026: Windows Ancillary Function Driver for WinSock Information Disclosure Vulnerability
CVE-2026-34346
5.5 - Medium
- July 14, 2026
Cleartext transmission of sensitive information in Windows Ancillary Function Driver for WinSock allows an authorized attacker to disclose information locally.
Cleartext Transmission of Sensitive Information
Jul 2026: Windows Secure Kernel Mode Elevation of Privilege Vulnerability
CVE-2026-42982
7.8 - High
- July 14, 2026
Improper validation of consistency within input in Windows Secure Kernel Mode allows an authorized attacker to elevate privileges locally.
Improper Validation of Consistency within Input
Jun 2026: Windows Graphics Component Remote Code Execution Vulnerability
CVE-2026-44812
7.8 - High
- June 09, 2026
Integer overflow or wraparound in Windows Win32K - GRFX allows an unauthorized attacker to execute code locally.
Integer Overflow or Wraparound
Jun 2026: Remote Desktop Client Remote Code Execution Vulnerability
CVE-2026-42993
7.5 - High
- June 09, 2026
Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
Heap-based Buffer Overflow
Jun 2026: Windows Graphics Component Remote Code Execution Vulnerability
CVE-2026-44803
7.8 - High
- June 09, 2026
Integer overflow or wraparound in Windows Win32K - GRFX allows an unauthorized attacker to execute code locally.
Integer Overflow or Wraparound
Jun 2026: Remote Desktop Client Remote Code Execution Vulnerability
CVE-2026-42985
8.8 - High
- June 09, 2026
Use after free in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
Dangling pointer
Jun 2026: Remote Desktop Client Remote Code Execution Vulnerability
CVE-2026-44801
7.5 - High
- June 09, 2026
Use after free in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
Dangling pointer
Jun 2026: Windows DWM Core Library Elevation of Privilege Vulnerability
CVE-2026-44802
7.8 - High
- June 09, 2026
Use after free in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.
Dangling pointer
Jun 2026: DHCP Client Service Remote Code Execution Vulnerability
CVE-2026-44815
9.8 - Critical
- June 09, 2026
Stack-based buffer overflow in Windows DHCP Client allows an unauthorized attacker to execute code over a network.
Stack Overflow
Jun 2026: Windows DWM Core Library Elevation of Privilege Vulnerability
CVE-2026-42983
7.8 - High
- June 09, 2026
Use after free in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.
Dangling pointer
Jun 2026: Remote Desktop Client Remote Code Execution Vulnerability
CVE-2026-44799
7.5 - High
- June 09, 2026
Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
Heap-based Buffer Overflow
Jun 2026: Microsoft Cryptographic Services Elevation of Privilege Vulnerability
CVE-2026-44810
8.4 - High
- June 09, 2026
Improper authentication in Windows Cryptographic Services allows an unauthorized attacker to elevate privileges locally.
authentification
Jun 2026: Remote Desktop Client Remote Code Execution Vulnerability
CVE-2026-42992
7.5 - High
- June 09, 2026
Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
Heap-based Buffer Overflow
Jun 2026: Winlogon Elevation of Privilege Vulnerability
CVE-2026-42989
7.8 - High
- June 09, 2026
Improper link resolution before file access ('link following') in Winlogon allows an authorized attacker to elevate privileges locally.
insecure temporary file
Jun 2026: Windows Push Notifications Elevation of Privilege Vulnerability
CVE-2026-42991
7.8 - High
- June 09, 2026
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Push Notifications allows an authorized attacker to elevate privileges locally.
Race Condition
Jun 2026: Windows Push Notifications Elevation of Privilege Vulnerability
CVE-2026-42977
7.8 - High
- June 09, 2026
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Push Notifications allows an authorized attacker to elevate privileges locally.
Race Condition
Jun 2026: Windows Push Notifications Elevation of Privilege Vulnerability
CVE-2026-42979
7.8 - High
- June 09, 2026
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Push Notifications allows an authorized attacker to elevate privileges locally.
Race Condition
Jun 2026: Windows Push Notifications Elevation of Privilege Vulnerability
CVE-2026-42978
7.8 - High
- June 09, 2026
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Push Notifications allows an authorized attacker to elevate privileges locally.
Race Condition
Jun 2026: Windows Performance Monitor Remote Code Execution Vulnerability
CVE-2026-42974
8.1 - High
- June 09, 2026
Integer overflow or wraparound in Windows Performance Monitor allows an unauthorized attacker to execute code over a network.
Integer Overflow or Wraparound
Jun 2026: Microsoft Graphics Component Elevation of Privilege Vulnerability
CVE-2026-42986
7.8 - High
- June 09, 2026
Use after free in Microsoft Graphics Component allows an authorized attacker to elevate privileges locally.
Dangling pointer
Jun 2026: Windows Performance Monitor Remote Code Execution Vulnerability
CVE-2026-42981
8.1 - High
- June 09, 2026
Integer underflow (wrap or wraparound) in Windows Performance Monitor allows an unauthorized attacker to execute code over a network.
Integer underflow
Jun 2026: Windows Kernel Elevation of Privilege Vulnerability
CVE-2026-42984
7 - High
- June 09, 2026
Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.
Dangling pointer
Jun 2026: Windows Push Notification Information Disclosure Vulnerability
CVE-2026-42970
5.5 - Medium
- June 09, 2026
Exposure of sensitive information to an unauthorized actor in Windows Push Notifications allows an authorized attacker to disclose information locally.
Information Disclosure
Jun 2026: Windows Push Notification Information Disclosure Vulnerability
CVE-2026-42973
5.5 - Medium
- June 09, 2026
Exposure of sensitive information to an unauthorized actor in Windows Push Notifications allows an authorized attacker to disclose information locally.
Information Disclosure
Jun 2026: Windows Push Notification Information Disclosure Vulnerability
CVE-2026-42969
5.5 - Medium
- June 09, 2026
Use of uninitialized resource in Windows Push Notifications allows an authorized attacker to disclose information locally.
Use of Uninitialized Resource
Jun 2026: Windows Push Notification Information Disclosure Vulnerability
CVE-2026-42971
5.5 - Medium
- June 09, 2026
Exposure of sensitive information to an unauthorized actor in Windows Push Notifications allows an authorized attacker to disclose information locally.
Information Disclosure
Jun 2026: Windows Telephony Server Information Disclosure Vulnerability
CVE-2026-42968
5.5 - Medium
- June 09, 2026
Out-of-bounds read in Windows Telephony Service allows an authorized attacker to disclose information locally.
Out-of-bounds Read
Jun 2026: Windows Hyper-V Information Disclosure Vulnerability
CVE-2026-42972
5.5 - Medium
- June 09, 2026
Exposure of sensitive information to an unauthorized actor in Windows Hyper-V allows an authorized attacker to disclose information locally.
Information Disclosure
Jun 2026: Microsoft Windows VMSwitch Denial of Service Vulnerability
CVE-2026-42915
5.5 - Medium
- June 09, 2026
Incorrect calculation of buffer size in Windows VMSwitch allows an authorized attacker to deny service locally.
Incorrect Calculation of Buffer Size
Jun 2026: Windows Kerberos Denial of Service Vulnerability
CVE-2026-42914
5.3 - Medium
- June 09, 2026
Out-of-bounds read in Windows Kerberos allows an authorized attacker to deny service over a network.
Out-of-bounds Read
Jun 2026: Windows Telephony Service Elevation of Privilege Vulnerability
CVE-2026-42912
7 - High
- June 09, 2026
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Telephony Service allows an authorized attacker to elevate privileges locally.
Race Condition
Jun 2026: Remote Desktop Client Remote Code Execution Vulnerability
CVE-2026-42913
7.5 - High
- June 09, 2026
Concurrent execution using shared resource with improper synchronization ('race condition') in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
Race Condition
Jun 2026: Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
CVE-2026-42911
7 - High
- June 09, 2026
Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
Dangling pointer
Jun 2026: NT OS Kernel Elevation of Privilege Vulnerability
CVE-2026-42916
7.8 - High
- June 09, 2026
Integer overflow or wraparound in Windows NT OS Kernel allows an authorized attacker to elevate privileges locally.
Integer Overflow or Wraparound
Jun 2026: NT OS Kernel Elevation of Privilege Vulnerability
CVE-2026-42980
7.8 - High
- June 09, 2026
Integer underflow (wrap or wraparound) in Windows NT OS Kernel allows an authorized attacker to elevate privileges locally.
Integer underflow
Jun 2026: Remote Desktop Client Remote Code Execution Vulnerability
CVE-2026-42909
7.5 - High
- June 09, 2026
Concurrent execution using shared resource with improper synchronization ('race condition') in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
Race Condition
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