CVE-2026-65678
HIGHCVSS 7/10
Last modified
CVE-2026-65678 is a high-severity vulnerability rated 7/10 on the CVSS scale. Use after free in Windows Win32K allows an authorized attacker to elevate privileges locally..
Description
Use after free in Windows Win32K allows an authorized attacker to elevate privileges locally.
Metrics
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows 10 Version 1607 | >= 10.0.14393.0, < 10.0.14393.9418 |
| Microsoft | Windows 10 Version 1809 | >= 10.0.17763.0, < 10.0.17763.9115 |
| Microsoft | Windows 10 Version 21H2 | >= 10.0.19044.0, < 10.0.19044.7663 |
| Microsoft | Windows 10 Version 22H2 | >= 10.0.19045.0, < 10.0.19045.7663 |
| Microsoft | Windows 11 version 23H2 | >= 10.0.22631.0, < 10.0.22631.7517 |
| Microsoft | Windows 11 Version 23H2 | >= 10.0.22631.0, < 10.0.22631.7517 |
| Microsoft | Windows 11 Version 24H2 | >= 10.0.26100.0, < 10.0.26100.9168 |
| Microsoft | Windows 11 Version 25H2 | >= 10.0.26200.0, < 10.0.26200.9168 |
| Microsoft | Windows 11 version 26H1 | >= 10.0.28000.0, < 10.0.28000.2704 |
| Microsoft | Windows Server 2016 | >= 10.0.14393.0, < 10.0.14393.9418 |
| Microsoft | Windows Server 2016 (Server Core installation) | >= 10.0.14393.0, < 10.0.14393.9418 |
| Microsoft | Windows Server 2019 | >= 10.0.17763.0, < 10.0.17763.9115 |
| Microsoft | Windows Server 2019 (Server Core installation) | >= 10.0.17763.0, < 10.0.17763.9115 |
| Microsoft | Windows Server 2022 | >= 10.0.20348.0, < 10.0.20348.5499 |
| Microsoft | Windows Server 2025 | >= 10.0.26100.0, < 10.0.26100.33296 |
| Microsoft | Windows Server 2025 (Server Core installation) | >= 10.0.26100.0, < 10.0.26100.33296 |
References
Timeline
- Published
- Last Modified
- Status
- Undergoing Analysis
Frequently Asked Questions
What is CVE-2026-65678?
Use after free in Windows Win32K allows an authorized attacker to elevate privileges locally.
How severe is CVE-2026-65678?
CVE-2026-65678 has a CVSS score of 7/10 (HIGH severity).
How do I fix CVE-2026-65678?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-65667Missing authorization in Microsoft Teams allows an unauthori…10
- CVE-2026-65668Improper access control in Microsoft Purview eDiscovery allo…8.8
- CVE-2026-65671Heap-based buffer overflow in Windows Remote Access API allo…7.8
- CVE-2026-65672Heap-based buffer overflow in Windows Remote Access API allo…7.8
- CVE-2026-65673Improper neutralization of special elements used in an sql c…7.8
- CVE-2026-65675No cwe for this issue in Visual Studio Code CoPilot Chat Ext…7.1
- CVE-2026-65679Heap-based buffer overflow in Windows iSCSI Target Service a…8.1
- CVE-2026-6568A vulnerability was determined in kodcloud KodExplorer up to…7.3
- CVE-2026-65680Improper link resolution before file access ('link following…6.7
- CVE-2026-65681Null pointer dereference in Windows iSCSI Target Service all…7.5
- CVE-2026-65687Bold Reports Standalone Report Designer before 14.1.12 conta…9.8
- CVE-2026-65688Bold Reports Standalone Report Designer before 14.1.12 conta…9.8
Are you affected by CVE-2026-65678?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST