Windows 11 Version 24H2: Access of Resource Using Incompatible Type
CVE-2026-45600 is a high-severity access of resource using incompatible type vulnerability in Windows 11 Version 24H2 from Microsoft, with a CVSS 3.1 base score of 7.8 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, without any action from a user. The record lists version 10.0.26100.8655 as the first without the flaw, so updating Windows 11 Version 24H2 to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.29% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Windows 11 Version 24H2 to 10.0.26100.8655 or a later version.
- Update Windows 11 Version 25H2 to 10.0.26200.8655 or a later version.
- Update Windows 11 version 26H1 to 10.0.28000.2269 or a later version.
- Read the advisory on msrc.microsoft.com for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Microsoft | Windows 11 Version 24H2 | 10.0.26100.0 up to, but not including, 10.0.26100.8655 | 10.0.26100.8655 |
| Microsoft | Windows 11 Version 25H2 | 10.0.26200.0 up to, but not including, 10.0.26200.8655 | 10.0.26200.8655 |
| Microsoft | Windows 11 version 26H1 | 10.0.28000.0 up to, but not including, 10.0.28000.2269 | 10.0.28000.2269 |
| Microsoft | Windows Server 2025 | 10.0.26100.0 up to, but not including, 10.0.26100.32995 | 10.0.26100.32995 |
| Microsoft | Windows Server 2025 (Server Core installation) | 10.0.26100.0 up to, but not including, 10.0.26100.32995 | 10.0.26100.32995 |
| Microsoft | Windows 11 24h2 | before 10.0.26100.8655 | 10.0.26100.8655 |
| Microsoft | Windows 11 25h2 | before 10.0.26200.8655 | 10.0.26200.8655 |
| Microsoft | Windows 11 26h1 | before 10.0.28000.2269 | 10.0.28000.2269 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- LocalThe attacker needs local access or must trick a user into running something.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. Scored by CNA (microsoft.com).
Official description
Access of resource using incompatible type ('type confusion') in Windows Kernel-Mode Drivers allows an authorized attacker to elevate privileges locally.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Access of Resource Using Incompatible Type
The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.
More Access of Resource Using Incompatible Type vulnerabilities (CWE-843)
Timeline
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- CVE record published.
- Record last changed materially (score, affected products, status or references).
References
Recent Access of Resource Using Incompatible Type vulnerabilities
- 8.8 High severity
- 7.3 High severity
- 8.8 High severity
- 9.6 Critical severity
- 8.8 High severity
- 8.8 High severity
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