Microsoft CEO Satya Nadella

Citing the issues reported by users with the Patch Tuesday update released last week, the Redmond-based giant Microsoft has released an Out-of-band (OOB) update on both clients and server platforms across Windows 10 and 11 to fix TLS/SSL handshake failure issues.

Microsoft releases an OOB update to fix a Patch Tuesday issue

Last week, Microsoft released its Patch Tuesday update on Windows 11, its first security update after it got updated to Windows 11 22H2. It was released as KB5018427, while the Windows 11 21H2 users got the name update under KB5018418.

However, after users got their hands on the update, some complained about issues preventing them from establishing network connections via Secure Socket Layer (SSL) and Transport Layer Security (TLS) protocol.

Dubbed an SSL/TLS handshake failure, it affected both Windows 11 client and server platforms. App developers would receive SEC_E_ILLEGAL_MESSAGE whenever they try establishing a network connection.

According to Microsoft, affected apps would be sending multiple frames consisting of one or more complete records and a partial record in a single buffer. Thus, they would get the error mentioned above, which has now been fixed.

How to update your system with OOB update?

The update is unavailable via Windows Update or Windows Server Update Services (WSUS).

Instead, you will have to go through Microsoft Update Catalog, download it and manually import it on WSUS and Microsoft Endpoint Configuration Manager.

Check on Microsoft’s official website to confirm if you are eligible for the update, or you’ll have to wait for the update to arrive.

Note that all Windows 10 are affected by this issue and the OOB will finally resolve it across all the versions. On the other hand, the issue is fixed on Windows 11 21H2. However, 22H2 remains plugged in with a patch.

You can learn more about the update here.

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