Skip to the content
The Update Bureau
Windows 10 1607 Windows 10 1607 Security update
Patch Tuesday Zero-day

KB5052006

KB5052006: Cumulative update for Windows 10, version 1607, February 2025. Exploited storage and WinSock flaws patched; USB audio fixed

In short

Fixes 31 vulnerabilities, including two actively exploited flaws, and resolves issues with USB cameras and audio devices.

Does it affect you? Applies to: Devices running Windows 10 Enterprise LTSB 2016, version 1607, on x86 or x64.

Build
14393.7785
Security
31 fixed · 1 critical · 2 exploited
Restart
Required

Microsoft publishes separate notes for this KB for Windows Server.

What changes

Fixes 3 changes

USB cameras

  • USB cameras are recognized as on again after the January 2025 security update.1

USB audio device drivers

Verified in package
  • The code 10 “This device cannot start” error with certain external audio management devices is fixed.2

Digital/Analog converter (DAC)

Verified in package
  • USB audio devices are less likely to stop working and interrupt playback, especially when using a DAC audio driver based on USB 1.0.3

Technical details

Data sheet · Security · Downloads · Components Click to collapse or expand

Data sheet

Released
2025-02-11
Classification
Security Updates
Type
Cumulative update
Restart
Required
Replaces
KB5049993, KB5048671, KB5046612, KB5037423
Replaced by
KB5053594
VersionBuildChannel
1607 14393.7785 General availability

Security

31 vulnerabilities fixed
2 exploited 1 critical 30 important
VulnerabilitySeverityCVSS
CVE-2025-21418 Exploited
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
 Important 7.8
CVE-2025-21391 Exploited
Windows Storage Elevation of Privilege Vulnerability
 Important 7.1
CVE-2025-21376
Windows Lightweight Directory Access Protocol (LDAP) Remote Code Execution Vulnerability
 Critical 8.1
CVE-2025-21377
NTLM Hash Disclosure Spoofing Vulnerability
 Important 6.5

The table lists the 4 exploited, publicly disclosed or critical vulnerabilities. See all 31 vulnerabilities →

Updated components

344 files changed since the previous update for the same versions.

Top changed componentsFiles
Remote Desktop10
Search8
Secure Boot8
Storage and file systems8
File Explorer and shell6
Graphics and display6
Security and sign-in6
Hyper-V and virtualization5
Networking4
Settings4
Audio3
Kernel2

Verified in package: changed files confirm USB audio device drivers, Digital/Analog converter (DAC).

Sources

Updated
Cited passages from Microsoft's official notes (3)
  1. 1. [USB cameras] Fixed: Your device does not recognize the camera is on. This issue occurs after you install the January 2025 security update. support.microsoft.com
  2. 2. [USB audio device drivers] Fixed: The code 10 error message, “This device cannot start” appears. This occurs when you connect to certain external audio management devices. support.microsoft.com
  3. 3. [Digital/Analog converter (DAC) (known issue)] Fixed: You might experience issues with USB audio devices. This is more likely when you use a DAC audio driver based on USB 1.0. support.microsoft.com
Checked automatically: 8 of 8 checks passed, 3 quoted passages · compared with Microsoft's page on Oct 20, 2026
  • Quotes found in the official pages: passed
  • Numbers found in the sources: passed
  • Vulnerabilities from the dossier only: passed
  • Links to allowed domains only: passed
  • Every official change covered: passed
  • Readable plain text: passed
  • Changes confirmed by the file list: passed
  • Sources agree: passed

A second AI read the text against the sources: correctness 4/5, clarity 4/5, completeness 5/5. How we work

Published by The Update Bureau. Written with AI from Microsoft's own documents, checked by rules and a second AI. How we work · Report a mistake