Windows 10 June 2019 updates may break some Bluetooth devices

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The June 2019 cumulative updates are now available for all
supported versions of Windows and the focus of the patches is
specifically on security improvements.
Windows 10 May 2019 Update is receiving KB4503293
which brings up Build 18362.175. On the other hand, Windows 10
October 2018 Update is getting
Build 17763.557.

It looks like one of the security improvement included in June
2019 updates could break your Bluetooth device if they fail to
meet the requirements.

Spotted by us, Microsoft quietly published a new support document to
announce that Windows 10’s latest cumulative update may break
your Bluetooth devices if they are outdated. It means you’ll
experience problems when connecting or pairing your Windows 10
computer to an outdated Bluetooth device.

This change applies to all versions of Windows 10, including
May 2019 Update and Windows 10 version 1507.

“You may experience issues pairing, connecting or using certain
Bluetooth devices after installing security updates released
June 11, 2019. These security updates address a security
vulnerability by intentionally preventing connections from
Windows to unsecure Bluetooth devices. Any device using
well-known keys to encrypt connections may be affected,
including certain security fobs,” Microsoft explains.

Advanced users familiar with the Event Viewer program can
determine whether their device is affected by looking for the
following Event Log:

Bluetooth event log

Some devices affected only

Microsoft is breaking some Bluetooth devices to fix a security
vulnerability. The June 2019 update includes a change that is
designed to prevent connections from Windows to unsecure
Bluetooth devices.

It’s not known how many devices are affected by the update, but
it appears that the connection of Bluetooth device using
well-known keys to encrypt connections is likely to be blocked.

It’s worth noting that only a small number of devices are
affected and you are recommended to install updates for your
Bluetooth device if you experience any connection issues.

Other improvements

This month’s cumulative update for Windows 10 does not come
with a long list of fixes. The Patch Tuesday update resolves
security bugs in the OS and other first-party apps like
Microsoft Edge, Internet Explorer and other components like
Windows Kernel.

As always, you can download and install it by checking for
updates in the Settings app. You can also defer the update for
a limited period of time from the advanced settings page.



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