Windows 11 has a new KB5009566 patch to fix vulnerability issues

A recently released patch is expected to fix a vulnerability that has been exploited by hackers over the past few months. This comes as part of Microsoft’s summer security updates, which also include fixes for Meltdown and Spectre vulnerabilities.


Claudiu Andone is a writer who lives in Romania.

Windows & Software Expert

Claudiu, a veteran of the computer and scientific press, is focused on everything fresh from Microsoft. His sudden interest in computers began when he was a child and saw the first Home Computer. However, his… Continue reading

  • Security updates and a fix for the Japanese Input Method Editors are included in the new KB5009566 SSU for Windows 11. (IME).
  • The CVE-2022-21889 Windows IKE Extension Denial of Service vulnerability is addressed by this necessary upgrade.
  • Because it’s critical to keep your system up to date, we’ve given instructions on how to manually download the patch.


Microsoft has released KB5009566, a new patch for Windows 11 that includes largely security updates as well as upgrades and fixes.

It’s important to know that The CVE-2022-21889 Windows IKE Extension Denial of Service vulnerability is addressed by this necessary upgrade.

The following are some of the highlights of the KB5009566, according to the Microsoft report:

  • Fixes a problem with the Japanese Input Method Editors (IME)
  • Updates your Windows operating system’s security.

We want to remind you that security updates are critical for maintaining the integrity of your system and protecting your data.

What enhancements and fixes are included in KB5009566 for Windows 11?

The KB5009566 SSU solves a problem with the Japanese Input Method Editors as well as security problems (IME).

When using a Japanese IME to input text, it seems that the cursor travels in an unusual way, and the content may appear out of order.

This may, however, occur in programs that employ the multibyte character set (MBCS). Microsoft Japanese IME and third-party Japanese IMEs are included.

What are the problems with KB5009566 that have been reported?

Unfortunately, this patch may introduce some issues. Color rendering difficulties may appear in picture editing applications or on High Dynamic Range (HDR) screens, for example.

The issue seems to impact white hues, which may appear as bright yellow or other colors.

Under some situations, some color-rendering Win32 APIs deliver unexpected information or errors, according to Microsoft.

This, however, will not impact all of Windows 11’s color profile control apps. The Microsoft Color Control Panel ought to function properly.

The software behemoth now lacks a solution, but it pledges to have one by the end of the month.

If the new patch isn’t available in the Windows Update section of Settings, you may manually download it from the Microsoft Update Catalog.

For more information, see our post on how Patch Tuesday works and how to safeguard your system and data.

If you’ve already installed the update and are having problems, please let us know in the comments below and we’ll do our best to assist you.

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Frequently Asked Questions

Do Windows updates fix issues?

A: No, updates will not fix issues. Please contact the manufacturer of your computer to resolve any software related issues you may have.

Why is Windows patching needed?

A: Due to the nature of operating systems, there are certain flaws in design that can make them susceptible to malicious code. In order for Microsoft and other software companies to provide security updates and patches, they need access into your system files so they can correct these issues.

Is patching Windows 10 safe?

A: Upgrading your computers operating system is always a bit scary, but we have some advice for you to stay safe and make the upgrade process smoother.

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