CVE-2025-26665: Windows upnphost.dll Elevation of Privilege Vulnerability
First published: Tue Apr 08 2025(Updated: )
<p>Sensitive data storage in improperly locked memory in Windows upnphost.dll allows an authorized attacker to elevate privileges locally.</p>
Credit: secure@microsoft.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Windows 10 | =1809 | |
| Microsoft Windows Server | ||
| Microsoft Windows Server 2012 R2 | ||
| Windows 10 | =22H2 | |
| Windows 10 | =1809 | |
| Windows 11 | =22H2 | |
| Windows 10 | =22H2 | |
| Windows 11 | =24H2 | |
| Windows 10 | =1607 | |
| Windows 11 | =24H2 | |
| Microsoft Windows Server 2008 R2 | ||
| Microsoft Windows Server | ||
| Windows 11 | =23H2 | |
| Microsoft Windows Server 2016 | ||
| Microsoft Windows Server 2008 R2 | ||
| Microsoft Windows Server 2022 23H2 | ||
| Microsoft Windows Server 2019 | ||
| Microsoft Windows Server 2025 | ||
| Windows 10 | =21H2 | |
| Microsoft Windows Server 2022 | ||
| Windows 10 | =21H2 | |
| Windows 11 | =22H2 | |
| Microsoft Windows Server | ||
| Windows 10 | =21H2 | |
| Microsoft Windows Server 2016 | ||
| Microsoft Windows Server 2012 R2 | ||
| Windows 10 | =22H2 | |
| Microsoft Windows Server 2025 | ||
| Windows 10 | =1607 | |
| Windows 11 | =23H2 | |
| Microsoft Windows Server 2022 | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server 2019 | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server | ||
| Windows 10 | ||
| Windows 10 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2025-26665?
CVE-2025-26665 has a high severity rating due to its potential to allow an authorized attacker to elevate privileges locally.
How do I fix CVE-2025-26665?
To fix CVE-2025-26665, apply the relevant patches from Microsoft that are provided for affected Windows versions.
Which products are affected by CVE-2025-26665?
CVE-2025-26665 affects several versions of Windows, including Windows 10, Windows Server 2008, and Windows Server 2022.
Can CVE-2025-26665 be exploited remotely?
CVE-2025-26665 requires local access, so it cannot be exploited remotely by an attacker.
Is there a workaround for CVE-2025-26665?
Currently, the recommended course of action for CVE-2025-26665 is to apply the security updates rather than relying on a workaround.
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- agent/author
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- agent/severity
- agent/source
- agent/description
- agent/tags
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- vendor/microsoft
- canonical/windows 10
- version/windows 10/1809
- canonical/microsoft windows server
- canonical/microsoft windows server 2012 r2
- version/windows 10/22h2
- canonical/windows 11
- version/windows 11/22h2
- version/windows 11/24h2
- version/windows 10/1607
- canonical/microsoft windows server 2008 r2
- version/windows 11/23h2
- canonical/microsoft windows server 2016
- canonical/microsoft windows server 2022 23h2
- canonical/microsoft windows server 2019
- canonical/microsoft windows server 2025
- version/windows 10/21h2
- canonical/microsoft windows server 2022