EvidenceSheet
UK Cyber Essentials · Security Update Management

SU.4 Remove Out-of-Support Software

Remove software that is no longer receiving security updates from in-scope devices, or fully segregate it from the rest of the network.

Source: UK Cyber Essentials, SU.4. The statement above is our statement of the clause, read from the published text and cited so you can check it against the official text, not the instrument verbatim. Open UK Cyber Essentials in the compliance library.

The version of the requirements is not stamped here; check the question set your certification body uses.

3
artefacts
1
held by a system
1
at each review
moderate
to go live
SIEM / log platform
where the evidence lives
teal = a system already holds it · olive = produced at each review. To go live: easy when half or more of the artefacts are already held by a system, moderate from a quarter to a half, hard below a quarter.

These are the artefacts auditors commonly ask for on this requirement, our guidance rather than text from the standard. Your assessor decides what is sufficient in your context, and asks for samples across the period when a report covers one.

system holds itEvidence a system already holds

  • EOL removal log · SIEM / log platform

periodic reviewEvidence produced at each review

  • Segregated VLAN evidence · Document repository

governing documentDocuments that govern the control

  • Compensating control documentation · Document repository

First move

Start with the 1 of 3 artefacts that already live in a system (SIEM / log platform); keep the periodic reviews but log each one as a dated record with a named reviewer.

Common gaps auditors find

Do this for your whole sheet

Paste the rows you run your controls from and get this mapping for every control at once, with the periodic-review ones flagged and a first move per row. No account for the first run.

Build my evidence sheet

SU.3 Critical and High Updates within 14 Days · SU.5 Firmware Updates