Windows Server 2016 Build 14393970 Enus April 2017 2021 ((top)) Jun 2026

Organizations still running the original build 14393.970 are vulnerable to an array of known exploits, making it a high-priority target for attackers who search for unpatched legacy systems.

Need to secure a 2016 server? Review the latest KB4015217 update notes for a starting point.

A Microsoft Q&A discussion from December 2021 confirms that . By 2021, attempting to manually install this old update would likely result in an error message stating it is "not applicable for this computer," as newer, more comprehensive updates already included all its fixes and more. windows server 2016 build 14393970 enus april 2017 2021

If you have landed on this article searching for windows server 2016 build 14393970 enus april 2017 2021 , you have likely encountered an OCR error or typo. The correct build number is , which corresponds to KB4015217 – the April 11, 2017, cumulative update for Windows Server 2016.

Beyond CVEs, Microsoft included:

As is standard for cumulative updates, KB4016635 contained only these quality improvements and did not introduce any new operating system features.

: Included native UEFI support and was one of the last major server releases to maintain some 32-bit counterpart packages for specific repair tasks. Windows Server release information | Microsoft Learn Organizations still running the original build 14393

If you discover a server running Build 14393.970 in your environment, careful lifecycle planning is required. Because this build dates back to 2017, it lacks protection against major vulnerabilities discovered in later years (such as PrintNightmare, BlueKeep variants, and advanced ransomware exploits). 1. Evaluate the Security Risk

Microsoft supports an in-place upgrade from Windows Server 2016 directly to newer versions like Windows Server 2022 or 2025. Maintenance Best Practices A Microsoft Q&A discussion from December 2021 confirms that

The "april 2017" reference points to a specific release, . Released on March 23, 2017, this update moved the operating system from build 14393.953 or 14393.969 to build 14393.970 . It is a significant, albeit small, security update that illustrates the nature of cumulative updates. Unlike modern cumulative updates, this one contained just two specific bug fixes , both addressing issues introduced by the previous Patch Tuesday update, KB4013429: