Black Arrow Cyber Advisory 12 October 2023 – Windows 11 21H2 and Windows Server 2012 Reach End of Support

Executive summary

Multiple editions of Windows 11, version 21H2 and Windows Server 2021 have reached end of support. This means that Microsoft will no longer provide technical assistance or provide security updates.

What’s the risk to me or my business?

There is a risk that organisations who are not aware of this, or do not know if they use Windows 11 21H2 and or Windows Server 2012 operating systems, will be leaving themselves open to attack. Any vulnerability discovered will not have appropriate patches available and organisations will therefore be unable to patch against attacks.

What can I do?

Black Arrow recommends organisations check with their IT departments or their external IT provider/MSP whether relevant Windows 11 21H2 and or Windows Server 2012 operating systems are in place and if they are, then organisations need to move away from these as soon as they can.

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