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ISO 27001 Annex A 5.22 Monitor, Review & Change Of Supplier Services | Lead Auditor Podcast

Published 31, Dec 2025

Stuart Barker


Description:
In this episode: Lead Auditor Stuart Barker and team do a deep dive into the ISO 27001 Annex A 5.22 Monitor, Review And Change Management Of Supplier Services. The podcast explores what it is, why it is important and the path to compliance.

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Read the full article: ISO 27001 Annex A 5.22 Monitor, Review And Change Management Of Supplier Services Ultimate Guide - https://hightable.io/iso-27001-annex-a-5-22-monitor-review-and-change-management-of-supplier-services/

*The Hidden Risk in Your Supply Chain*

If you work in security or risk, you know the daily grind. You patch your systems. You build firewalls. You train your team. You spend so much energy locking down your own office.

But what about the other companies you rely on? You might use dozens or even hundreds of them every day. This is your supply chain.

They handle your important data. Sadly, suppliers are often the biggest threat to your safety. They are a risk to your name, your money, and your success.

Here is the funny thing about business today. We need these vendors for speed. But when you outsource a job, you outsource the risk. The catch? You keep the blame.

We see it all the time. A breach happens. It gets traced back to a weak spot in a third-party vendor.

*Enter ISO 27001 Annex A 5.22*

This is where rules help. We are looking at a key part of ISO 27001. It is called Annex A 5.22. The full name is "monitor, review, and change management of supplier services."

That sounds dry. But the goal is simple. You must make sure your suppliers keep their security promises.

This rule asks you to watch your vendors. You must check their work. You must manage changes. It is a formal way to ensure that what is written on paper actually happens in real life.

*Why It Matters*

Why is this such a big deal? Because it stops bad things before they happen.

Think about the basic goals of security: keeping secrets, keeping data safe, and keeping systems running.

Secrets: If a cloud vendor misses a patch, your data is exposed.

Data Safety: If a software vendor pushes a bad update, it could break your files.

Uptime: If a vendor crashes because they have no backups, your business goes offline.

Annex A 5.22 is your safety net. It is the difference between hoping they are safe and knowing they are safe.

*The Six Steps to Success*

An expert auditor gave us a six-step list to get this right.

The Policy: You need a written set of rules for suppliers. This sets the standard.

The Process: You need a plan for the whole relationship. How do you hire them? How do you fire them safely so no data is left behind?

The Register: This is a list of all your suppliers. It tracks who they are and how risky they are. It tells you who holds the keys to your castle.

The Agreement: You need contracts. Do not rely on verbal deals. The contract must list your security rules.

The Proof: You need evidence that they are safe. Ask for their security certificate or an audit report.

The Watch: You must monitor them. Check their reports. Did they change anything? Did they move your data to a new country? You need to verify these changes.

*Avoiding Common Mistakes*

Auditors look for specific things. If you want to pass, avoid these three traps:

Trap 1: Not Monitoring. You must have proof you are watching. Keep minutes of meetings. Keep reports. If an auditor asks, "Tell me about a time a vendor failed," you need an answer.

Trap 2: Weak Proof. Don't just get any certificate. If you use a vendor's cloud tool, but their certificate is only for their HR office, it is useless. The proof must match the service you use.

Trap 3: Bad Documents. This sounds small, but it hurts. Check your version numbers. If your policy says "Version 1.2" but your main list says "Version 1.1," you will fail. It shows your process is broken.

*The Fast Track*

Doing this from scratch is hard. Writing the policy alone can take days. Building the whole system can take one to three months.

But you don't have to reinvent the wheel.

There is a standardised way to do this. It is the ISO 27001 Toolkit from High Table. It was built by a lead auditor with 30 years of experience. It gives you the templates, the lists, and the guides you need.

With this toolkit, you can turn months of work into less than a day. It removes the hassle so you can focus on real security.

*The Bottom Line*

Managing suppliers is not just paperwork. It protects your business. Don't just trust a certificate from last year. Check on them today.

#iso27001 #iso27001certification

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