Windows 10 Version 1607: NULL Pointer Dereference
CVE-2026-32071 is a high-severity NULL pointer dereference vulnerability in Windows 10 Version 1607 from Microsoft, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists version 10.0.14393.9060 as the first without the flaw, so updating Windows 10 Version 1607 to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 1.1% chance of exploitation within 30 days, higher than 66% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Windows 10 Version 1607 to 10.0.14393.9060 or a later version.
- Update Windows 10 Version 1809 to 10.0.17763.8644 or a later version.
- Update Windows 10 Version 21H2 to 10.0.19044.7184 or a later version.
- Read the advisory on msrc.microsoft.com for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Microsoft | Windows 10 Version 1607 | 10.0.14393.0 up to, but not including, 10.0.14393.9060 | 10.0.14393.9060 |
| Microsoft | Windows 10 Version 1809 | 10.0.17763.0 up to, but not including, 10.0.17763.8644 | 10.0.17763.8644 |
| Microsoft | Windows 10 Version 21H2 | 10.0.19044.0 up to, but not including, 10.0.19044.7184 | 10.0.19044.7184 |
| Microsoft | Windows 10 Version 22H2 | 10.0.19045.0 up to, but not including, 10.0.19045.7184 | 10.0.19045.7184 |
| Microsoft | Windows 11 version 23H2 | 10.0.22631.0 up to, but not including, 10.0.22631.6936 | 10.0.22631.6936 |
| Microsoft | Windows 11 Version 24H2 | 10.0.26100.0 up to, but not including, 10.0.26100.8246 | 10.0.26100.8246 |
| Microsoft | Windows 11 Version 25H2 | 10.0.26200.0 up to, but not including, 10.0.26200.8246 | 10.0.26200.8246 |
| Microsoft | Windows 11 version 26H1 | 10.0.28000.0 up to, but not including, 10.0.28000.1836 | 10.0.28000.1836 |
| Microsoft | Windows Server 2016 | 10.0.14393.0 up to, but not including, 10.0.14393.9060 | 10.0.14393.9060 |
| Microsoft | Windows Server 2016 (Server Core installation) | 10.0.14393.0 up to, but not including, 10.0.14393.9060 | 10.0.14393.9060 |
| Microsoft | Windows Server 2019 | 10.0.17763.0 up to, but not including, 10.0.17763.8644 | 10.0.17763.8644 |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.17763.0 up to, but not including, 10.0.17763.8644 | 10.0.17763.8644 |
| Microsoft | Windows Server 2022 | 10.0.20348.0 up to, but not including, 10.0.20348.5020 | 10.0.20348.5020 |
| Microsoft | Windows Server 2022, 23H2 Edition (Server Core installation) | 10.0.25398.0 up to, but not including, 10.0.25398.2274 | 10.0.25398.2274 |
| Microsoft | Windows Server 2025 | 10.0.26100.0 up to, but not including, 10.0.26100.32690 | 10.0.26100.32690 |
| Microsoft | Windows Server 2025 (Server Core installation) | 10.0.26100.0 up to, but not including, 10.0.26100.32690 | 10.0.26100.32690 |
| Microsoft | Windows 10 1607 | before 10.0.14393.9060 | 10.0.14393.9060 |
| Microsoft | Windows 10 1809 | before 10.0.17763.8644 | 10.0.17763.8644 |
| Microsoft | Windows 10 21h2 | before 10.0.19044.7184 | 10.0.19044.7184 |
| Microsoft | Windows 10 22h2 | before 10.0.19045.7184 | 10.0.19045.7184 |
| Microsoft | Windows 11 23h2 | before 10.0.22631.6936 | 10.0.22631.6936 |
| Microsoft | Windows 11 24h2 | before 10.0.26100.8246 | 10.0.26100.8246 |
| Microsoft | Windows 11 25h2 | before 10.0.26200.8246 | 10.0.26200.8246 |
| Microsoft | Windows 11 26h1 | before 10.0.28000.1836 | 10.0.28000.1836 |
| Microsoft | Windows Server 2022 23h2 | before 10.0.25398.2274 | 10.0.25398.2274 |
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
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- NoneNo data is disclosed.
- Integrity
- NoneNothing can be modified.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. Scored by CNA (microsoft.com).
Official description
Null pointer dereference in Windows Local Security Authority Subsystem Service (LSASS) allows an unauthorized attacker to deny service over a network.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: NULL Pointer Dereference
The product dereferences a pointer that it expects to be valid but is NULL.
How developers prevent this class of flaw
- For any pointers that could have been modified or provided from a function that can return NULL, check the pointer for NULL before use. When working with a multithreaded or otherwise asynchronous environment, ensure that proper locking APIs are used to lock before the check, and unlock when it has finished.
- Select a programming language that is not susceptible to these issues.
- Check the results of all functions that return a value and verify that the value is non-null before acting upon it.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Recent NULL Pointer Dereference vulnerabilities
- 7.5 High severity
- 9.8 Critical severity
- 7.1 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
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