Known vulnerabilities in Microsoft Windows 11 version 26H1
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CVE list
| CVE | Summary | Score | Published |
|---|---|---|---|
| CVE-2026-83578 | Integer underflow (wrap or wraparound) in Windows PowerShell allows an unauthorized attacker to execute code over a… | 9.8 Critical | Oct 13, 2026 |
| CVE-2026-83641 | Heap-based buffer overflow in Windows Media allows an authorized attacker to elevate privileges locally | 7.8 High | Oct 13, 2026 |
| CVE-2026-83518 | Heap-based buffer overflow in RPC Runtime allows an authorized attacker to elevate privileges locally | 7.8 High | Oct 13, 2026 |
| CVE-2026-83580 | Heap-based buffer overflow in Windows Client-Side Caching (CSC) Service allows an authorized attacker to elevate… | 7.0 High | Oct 13, 2026 |
| CVE-2026-83583 | Improper access control in Windows Geotag Broker allows an authorized attacker to elevate privileges locally | 7.8 High | Oct 13, 2026 |
| CVE-2026-83584 | Use after free in Windows Smart Card allows an authorized attacker to elevate privileges locally | 7.0 High | Oct 13, 2026 |
| CVE-2026-69633 | Heap-based buffer overflow in Windows Update allows an authorized attacker to elevate privileges locally | 7.8 High | Oct 13, 2026 |
| CVE-2026-69718 | Improper neutralization of special elements used in a command ('command injection') in Windows Update allows an… | 7.8 High | Oct 13, 2026 |
| CVE-2026-69882 | Untrusted search path in Windows Update allows an authorized attacker to elevate privileges locally | 7.8 High | Oct 13, 2026 |
| CVE-2026-69650 | Improper verification of cryptographic signature in Windows Key Distribution Center allows an authorized attacker to… | 7.8 High | Oct 13, 2026 |
| CVE-2026-69743 | Use after free in Windows Program Compatibility Assistant Service allows an authorized attacker to elevate privileges… | 7.0 High | Oct 13, 2026 |
| CVE-2026-69673 | Improper link resolution before file access ('link following') in Windows Update allows an authorized attacker to… | 7.8 High | Oct 13, 2026 |
| CVE-2026-83500 | Url redirection to untrusted site ('open redirect') in Windows BitLocker allows an unauthorized attacker to bypass a… | 6.1 Medium | Oct 13, 2026 |
| CVE-2026-72969 | Use after free in Windows Program Compatibility Assistant Service allows an authorized attacker to elevate privileges… | 7.0 High | Oct 13, 2026 |
| CVE-2026-83504 | Time-of-check time-of-use (toctou) race condition in Windows SmartScreen allows an authorized attacker to disclose… | 4.7 Medium | Oct 13, 2026 |
| CVE-2026-81964 | Use of hard-coded credentials in Windows Update Orchestrator Service allows an authorized attacker to bypass a… | 5.5 Medium | Oct 13, 2026 |
| CVE-2026-69387 | Use after free in Windows Error Reporting allows an authorized attacker to elevate privileges locally | 7.0 High | Oct 13, 2026 |
| CVE-2026-69721 | Out-of-bounds read in Windows iSCSI allows an authorized attacker to disclose information locally | 5.5 Medium | Oct 13, 2026 |
| CVE-2026-69644 | Exposure of sensitive system information to an unauthorized control sphere in Windows iSCSI allows an authorized… | 5.5 Medium | Oct 13, 2026 |
| CVE-2026-69883 | Use after free in Windows iSCSI allows an unauthorized attacker to execute code over a network | 9.8 Critical | Oct 13, 2026 |
| CVE-2026-69354 | Heap-based buffer overflow in Windows Error Reporting allows an authorized attacker to elevate privileges locally | 7.8 High | Oct 13, 2026 |
| CVE-2026-72934 | Use after free in Windows Program Compatibility Assistant Service allows an authorized attacker to elevate privileges… | 7.0 High | Oct 13, 2026 |
| CVE-2026-72955 | Use after free in Windows Application Compatibility Cache allows an authorized attacker to elevate privileges locally | 7.0 High | Oct 13, 2026 |
| CVE-2026-70580 | Missing authentication for critical function in Windows Credential Guard allows an authorized attacker to perform… | 8.8 High | Oct 13, 2026 |
| CVE-2026-69634 | Heap-based buffer overflow in Windows iSCSI allows an unauthorized attacker to execute code over a network | 9.8 Critical | Oct 13, 2026 |
Other Microsoft products
Windows Server 2019 5745
Windows Server 2019 (Server Core installation) 5648
Windows 10 Version 1809 5349
Windows Server 2022 5112
Windows Server 2016 5051
Windows Server 2016 (Server Core installation) 4847
Windows 10 Version 21H2 4539
Windows 10 Version 1607 4535
Windows Server 2012 R2 4103
Windows 10 Version 22H2 4041
Windows Server 2012 R2 (Server Core installation) 3958
Windows Server 2012 3865