Microsoft Releases Windows 10 KB5075912 Security Update Addressing Six Zero-Day Vulnerabilities
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Quick Summary
Microsoft has released the Windows 10 KB5075912 extended security update to address vulnerabilities identified during the February 2026 Patch Tuesday, including six zero-days. This update is applicable for users running Windows 10 Enterprise LTSC or those enrolled in the ESU program. The update also includes fixes for known issues, such as problems with shutting down or hibernating devices with Secure Launch enabled.
The Securityish Brief
On February 10, 2026, Microsoft issued the Windows 10 KB5075912 extended security update, which addresses 58 vulnerabilities, including six actively exploited zero-day flaws. This update is crucial for users on Windows 10 Enterprise LTSC and those participating in the ESU program, ensuring they maintain security against these vulnerabilities.
The KB5075912 update brings Windows 10 to build 19045.6937 and Windows 10 Enterprise LTSC 2021 to build 19044.6937. It focuses solely on security and bug fixes, as Microsoft has ceased releasing new features for Windows 10.
Among the fixes included in this update are changes to Chinese fonts for compliance with GB18030-2022A, resolution of a known issue preventing certain PCs from shutting down or hibernating, and improvements to folder renaming in File Explorer.
Additionally, the update addresses a stability issue affecting specific graphics processing units (GPUs) and continues the rollout of new Secure Boot certificates, which are critical for maintaining the integrity of the boot process.
Microsoft has warned that multiple Secure Boot certificates from 2011 will expire in June 2026, which could allow threat actors to bypass security protections if not updated. The KB5075912 update helps mitigate this risk by ensuring that devices receive the necessary new certificates.
There are currently no known issues associated with this update, making it a vital installation for users to enhance their system security.
- Chinese Fonts: This update includes changes to Chinese fonts to meet GB18030-2022A compliance.
- OS Security (Known Issue): Fixed an issue where Secure Launch-capable PCs were unable to shut down or hibernate after a security update.
- Folders: Fixed an issue affecting folder renaming with desktop.ini files in File Explorer.
- Graphics: Addressed a stability issue affecting certain GPU configurations.
- Secure Boot: The update includes targeting data for devices to receive new Secure Boot certificates.
Key Takeaways
- Check for updates in Windows 10 settings to ensure you have installed the KB5075912 update.
- Verify that your device is running the latest build (19045.6937) to maintain security compliance.
- Monitor for any issues related to Secure Boot certificates and ensure your system receives the new certificates.
- Review any known issues with your system, especially if using Secure Launch capabilities.
- Stay informed about future updates from Microsoft to protect against vulnerabilities.
Key Terms & Concepts
- Zero-Day Vulnerability: In this article, a zero-day vulnerability refers to a security flaw that is exploited by attackers before the vendor has released a fix.
- Secure Boot: Secure Boot is a security standard that ensures only trusted software is loaded during the boot process.
- Enterprise LTSC: Enterprise LTSC refers to the Long-Term Servicing Channel version of Windows 10 designed for specialized devices that require a stable operating system.
- ESU Program: The ESU program is the Extended Security Updates program that provides security updates for devices running older versions of Windows.
- GB18030-2022A: GB18030-2022A is a compliance standard for Chinese character encoding that ensures proper display and usage of Chinese fonts.
Read the original article here: https://www.bleepingcomputer.com/news/microsoft/microsoft-releases-windows-10-kb5075912-extended-security-update/
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