Microsoft Windows 11 23h2
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By the Year
In 2026 there have been 2093 vulnerabilities in Microsoft Windows 11 23h2 with an average score of 7.3 out of ten. Last year, in 2025 Windows 11 23h2 had 663 security vulnerabilities published. That is, 1430 more vulnerabilities have already been reported in 2026 as compared to last year. However, the average CVE base score of the vulnerabilities in 2026 is greater by 0.05.
| Year | Vulnerabilities | Average Score |
|---|---|---|
| 2026 | 2093 | 7.26 |
| 2025 | 663 | 7.21 |
| 2024 | 541 | 7.34 |
| 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
Oct 2026: Role: DNS Server Information Disclosure Vulnerability
CVE-2026-97844
6.5 - Medium
- October 13, 2026
Out-of-bounds read in DNS Server allows an authorized attacker to disclose information over a network.
Out-of-bounds Read
Oct 2026: Role: DNS Server Information Disclosure Vulnerability
CVE-2026-97843
6.5 - Medium
- October 13, 2026
Out-of-bounds read in DNS Server allows an authorized attacker to disclose information over a network.
Out-of-bounds Read
Oct 2026: Role: DNS Server Information Disclosure Vulnerability
CVE-2026-97842
6.5 - Medium
- October 13, 2026
Out-of-bounds read in DNS Server allows an authorized attacker to disclose information over a network.
Out-of-bounds Read
Oct 2026: Role: DNS Server Information Disclosure Vulnerability
CVE-2026-97841
6.5 - Medium
- October 13, 2026
Out-of-bounds read in DNS Server allows an authorized attacker to disclose information over a network.
Out-of-bounds Read
Oct 2026: Role: DNS Server Information Disclosure Vulnerability
CVE-2026-97840
6.5 - Medium
- October 13, 2026
Out-of-bounds read in DNS Server allows an authorized attacker to disclose information over a network.
Out-of-bounds Read
Oct 2026: Role: DNS Server Information Disclosure Vulnerability
CVE-2026-97839
6.5 - Medium
- October 13, 2026
Out-of-bounds read in DNS Server allows an authorized attacker to disclose information over a network.
Out-of-bounds Read
Oct 2026: Role: DNS Server Information Disclosure Vulnerability
CVE-2026-97838
6.5 - Medium
- October 13, 2026
Out-of-bounds read in DNS Server allows an authorized attacker to disclose information over a network.
Out-of-bounds Read
Oct 2026: Role: DNS Server Information Disclosure Vulnerability
CVE-2026-97837
6.5 - Medium
- October 13, 2026
Out-of-bounds read in DNS Server allows an authorized attacker to disclose information over a network.
Out-of-bounds Read
Oct 2026: Role: DNS Server Information Disclosure Vulnerability
CVE-2026-97836
6.5 - Medium
- October 13, 2026
Out-of-bounds read in DNS Server allows an authorized attacker to disclose information over a network.
Out-of-bounds Read
Oct 2026: Role: DNS Server Information Disclosure Vulnerability
CVE-2026-97835
6.5 - Medium
- October 13, 2026
Out-of-bounds read in DNS Server allows an authorized attacker to disclose information over a network.
Out-of-bounds Read
Oct 2026: Role: DNS Server Information Disclosure Vulnerability
CVE-2026-97834
6.5 - Medium
- October 13, 2026
Out-of-bounds read in DNS Server allows an authorized attacker to disclose information over a network.
Out-of-bounds Read
Oct 2026: Role: DNS Server Information Disclosure Vulnerability
CVE-2026-97833
6.5 - Medium
- October 13, 2026
Out-of-bounds read in DNS Server allows an authorized attacker to disclose information over a network.
Out-of-bounds Read
Oct 2026: Role: DNS Server Information Disclosure Vulnerability
CVE-2026-97832
6.5 - Medium
- October 13, 2026
Out-of-bounds read in DNS Server allows an authorized attacker to disclose information over a network.
Out-of-bounds Read
Oct 2026: Role: DNS Server Information Disclosure Vulnerability
CVE-2026-97820
6.5 - Medium
- October 13, 2026
Out-of-bounds read in DNS Server allows an authorized attacker to disclose information over a network.
Out-of-bounds Read
Oct 2026: Role: DNS Server Information Disclosure Vulnerability
CVE-2026-97821
6.5 - Medium
- October 13, 2026
Out-of-bounds read in DNS Server allows an authorized attacker to disclose information over a network.
Out-of-bounds Read
Oct 2026: Role: DNS Server Information Disclosure Vulnerability
CVE-2026-97822
6.5 - Medium
- October 13, 2026
Out-of-bounds read in DNS Server allows an authorized attacker to disclose information over a network.
Out-of-bounds Read
Oct 2026: Role: DNS Server Information Disclosure Vulnerability
CVE-2026-97823
6.5 - Medium
- October 13, 2026
Out-of-bounds read in DNS Server allows an authorized attacker to disclose information over a network.
Out-of-bounds Read
Oct 2026: Role: DNS Server Information Disclosure Vulnerability
CVE-2026-97824
6.5 - Medium
- October 13, 2026
Out-of-bounds read in DNS Server allows an authorized attacker to disclose information over a network.
Out-of-bounds Read
Oct 2026: Role: DNS Server Information Disclosure Vulnerability
CVE-2026-97825
6.5 - Medium
- October 13, 2026
Out-of-bounds read in DNS Server allows an authorized attacker to disclose information over a network.
Out-of-bounds Read
Oct 2026: Role: DNS Server Information Disclosure Vulnerability
CVE-2026-97831
6.5 - Medium
- October 13, 2026
Out-of-bounds read in DNS Server allows an authorized attacker to disclose information over a network.
Out-of-bounds Read
Oct 2026: Windows Internet Information Services Denial of Service Vulnerability
CVE-2026-97830
7.5 - High
- October 13, 2026
Double free in Windows Internet Information Services allows an unauthorized attacker to deny service over a network.
Double-free
Oct 2026: Role: DNS Server Information Disclosure Vulnerability
CVE-2026-97829
6.5 - Medium
- October 13, 2026
Out-of-bounds read in DNS Server allows an authorized attacker to disclose information over a network.
Out-of-bounds Read
Oct 2026: Role: DNS Server Information Disclosure Vulnerability
CVE-2026-97828
6.5 - Medium
- October 13, 2026
Buffer over-read in DNS Server allows an authorized attacker to disclose information over a network.
Buffer Over-read
Oct 2026: Role: DNS Server Information Disclosure Vulnerability
CVE-2026-97827
6.5 - Medium
- October 13, 2026
Out-of-bounds read in DNS Server allows an authorized attacker to disclose information over a network.
Out-of-bounds Read
Oct 2026: Role: DNS Server Information Disclosure Vulnerability
CVE-2026-97826
6.5 - Medium
- October 13, 2026
Out-of-bounds read in DNS Server allows an authorized attacker to disclose information over a network.
Out-of-bounds Read
Oct 2026: Windows Broadcast DVR User Service Elevation of Privilege Vulnerability
CVE-2026-97806
7.8 - High
- October 13, 2026
Use after free in Windows Broadcast DVR User Service allows an authorized attacker to elevate privileges locally.
Dangling pointer
Oct 2026: Windows Broadcast DVR User Service Elevation of Privilege Vulnerability
CVE-2026-97807
7.8 - High
- October 13, 2026
Use after free in Windows Broadcast DVR User Service allows an authorized attacker to elevate privileges locally.
Dangling pointer
Oct 2026: Windows Broadcast DVR User Service Elevation of Privilege Vulnerability
CVE-2026-97808
7 - High
- October 13, 2026
Use after free in Windows Broadcast DVR User Service allows an authorized attacker to elevate privileges locally.
Dangling pointer
Oct 2026: Windows Broadcast DVR User Service Elevation of Privilege Vulnerability
CVE-2026-97809
7.8 - High
- October 13, 2026
Use after free in Windows Broadcast DVR User Service allows an authorized attacker to elevate privileges locally.
Dangling pointer
Oct 2026: Microsoft OpenSSH for Windows Elevation of Privilege Vulnerability
CVE-2026-97811
7.8 - High
- October 13, 2026
Double free in OpenSSH for Windows allows an authorized attacker to elevate privileges locally.
Double-free
Oct 2026: Windows Update Orchestrator Service Elevation of Privilege Vulnerability
CVE-2026-97812
7 - High
- October 13, 2026
Double free in Windows Update Orchestrator Service allows an authorized attacker to elevate privileges locally.
Double-free
Oct 2026: Windows Hyper-V Information Disclosure Vulnerability
CVE-2026-97813
6.5 - Medium
- October 13, 2026
Heap-based buffer overflow in Windows Hyper-V allows an authorized attacker to disclose information over a network.
Heap-based Buffer Overflow
Oct 2026: Windows Text Shaping Remote Code Execution Vulnerability
CVE-2026-97814
9.8 - Critical
- October 13, 2026
Heap-based buffer overflow in Windows Text Shaping allows an unauthorized attacker to execute code over a network.
Heap-based Buffer Overflow
Oct 2026: Windows Error Reporting Remote Code Execution Vulnerability
CVE-2026-97815
9.8 - Critical
- October 13, 2026
Heap-based buffer overflow in Windows Error Reporting allows an unauthorized attacker to execute code over a network.
Heap-based Buffer Overflow
Oct 2026: Microsoft OpenSSH for Windows Remote Code Execution Vulnerability
CVE-2026-97816
9.8 - Critical
- October 13, 2026
Use after free in OpenSSH for Windows allows an unauthorized attacker to execute code over a network.
Dangling pointer
Oct 2026: Role: DNS Server Information Disclosure Vulnerability
CVE-2026-97817
6.5 - Medium
- October 13, 2026
Heap-based buffer overflow in DNS Server allows an authorized attacker to disclose information over a network.
Heap-based Buffer Overflow
Oct 2026: Role: DNS Server Information Disclosure Vulnerability
CVE-2026-97819
6.5 - Medium
- October 13, 2026
Out-of-bounds read in DNS Server allows an authorized attacker to disclose information over a network.
Out-of-bounds Read
Oct 2026: HID Class Driver Elevation of Privilege Vulnerability
CVE-2026-97804
7.8 - High
- October 13, 2026
Heap-based buffer overflow in HID class driver allows an authorized attacker to elevate privileges locally.
Heap-based Buffer Overflow
Oct 2026: Windows Partition Management Driver Remote Code Execution Vulnerability
CVE-2026-97805
9.8 - Critical
- October 13, 2026
Out-of-bounds read in Windows Partition Management Driver allows an unauthorized attacker to execute code over a network.
Out-of-bounds Read
Oct 2026: Windows Error Reporting Service Elevation of Privilege Vulnerability
CVE-2026-97798
7.8 - High
- October 13, 2026
Improper neutralization of argument delimiters in a command ('argument injection') in Windows Error Reporting allows an authorized attacker to elevate privileges locally.
Argument Injection
Oct 2026: RPC Runtime Library Remote Code Execution Vulnerability
CVE-2026-88219
8.8 - High
- October 13, 2026
Untrusted pointer dereference in RPC Runtime allows an unauthorized attacker to execute code over a network.
Untrusted Pointer Dereference
Oct 2026: Windows Storage Port Driver Information Disclosure Vulnerability
CVE-2026-88226
4.6 - Medium
- October 13, 2026
Out-of-bounds read in Windows Storage Port Driver allows an unauthorized attacker to disclose information with a physical attack.
Out-of-bounds Read
Oct 2026: Windows Network File System Elevation of Privilege Vulnerability
CVE-2026-96209
7 - High
- October 13, 2026
Out-of-bounds read in Windows Network File System allows an authorized attacker to elevate privileges locally.
Out-of-bounds Read
Oct 2026: Windows Security Center Elevation of Privilege Vulnerability
CVE-2026-70212
7 - High
- October 13, 2026
Improper restriction of communication channel to intended endpoints in Windows Security Center allows an authorized attacker to elevate privileges locally.
Improper Restriction of Communication Channel to Intended Endpoints
Oct 2026: Windows Hyper-V Elevation of Privilege Vulnerability
CVE-2026-70023
7.8 - High
- October 13, 2026
Use after free in Windows Hyper-V allows an authorized attacker to elevate privileges locally.
Dangling pointer
Oct 2026: Windows Key Storage Provider Information Disclosure Vulnerability
CVE-2026-69506
4.7 - Medium
- October 13, 2026
Out-of-bounds read in Windows Key Storage Provider allows an authorized attacker to disclose information locally.
Out-of-bounds Read
Oct 2026: Active Directory Federation Services (AD FS) Information Disclosure Vulnerability
CVE-2026-97788
7.5 - High
- October 13, 2026
Observable discrepancy in Active Directory Federation Services (AD FS) allows an unauthorized attacker to disclose information over a network.
Side Channel Attack
Oct 2026: Windows Container Isolation FS Filter Driver (unionfs.sys) Elevation of Privilege Vulnerab
CVE-2026-97787
7 - High
- October 13, 2026
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally.
Race Condition
Oct 2026: Windows Container Isolation FS Filter Driver (unionfs.sys) Elevation of Privilege Vulnerab
CVE-2026-97792
7.8 - High
- October 13, 2026
Improper access control in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally.
Incorrect Permission Assignment for Critical Resource
Oct 2026: Windows Setup and Deployment Elevation of Privilege Vulnerability
CVE-2026-97793
7 - High
- October 13, 2026
Missing authentication for critical function in Windows Setup and Deployment allows an authorized attacker to elevate privileges locally.
Missing Authentication for Critical Function
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