Why Cloud Security Matters More Than Ever

Cloud adoption has stopped being a competitive advantage and become the default way businesses operate. But that shift has created a dangerous gap between how secure people assume the cloud is and how secure it actually is, and that gap is exactly what attackers are exploiting at scale.

Recent industry data makes the scale of the problem clear: 27% of organisations using public clouds faced security incidents in 2024, up 10% from the year before, with an average of 43 misconfigurations per account. Roughly 82% of those misconfigurations trace back to human error rather than a flaw in the provider's technology.

In other words: the cloud isn't the weak link. How organisations use the cloud is.

The Core Misconception: "The Provider Handles Security"

This is the single most damaging assumption in cloud security today. It's understandable, since providers like AWS, Microsoft Azure, and Google Cloud invest billions in securing their infrastructure, and their marketing (rightly) emphasises how robust that infrastructure is.

But "secure infrastructure" and "secure usage" are not the same thing. Gartner projects that 99% of cloud security failures through 2026 will be the customer's fault, not the provider's, a statistic that should reframe how every IT and security leader thinks about cloud risk.

Other common misconceptions worth retiring

• "We're a small target." 89% of businesses impacted by cloud misconfigurations in recent research were startups, since attackers scan for exposed resources indiscriminately, regardless of company size.
• "Multi-cloud spreads out our risk." In practice it multiplies complexity: 79% of organisations now use more than one cloud provider, which increases the surface area for misconfiguration, and 69% report difficulty maintaining consistent security controls across providers.
• "Our compliance certification means we're secure." Compliance frameworks are a floor, not a ceiling. They confirm controls exist at a point in time, but they don't confirm those controls are configured correctly today.
• "Encryption and firewalls are enough." The most frequent cloud misconfigurations are still storage buckets left with public access enabled, overly permissive IAM roles with wildcard permissions, security groups allowing unrestricted inbound traffic, unencrypted volumes, and disabled logging: all issues that sit above the provider's infrastructure layer.

What Is the Shared Responsibility Model?

The shared responsibility model is the framework every major cloud provider uses to divide security duties between themselves and their customers. It answers a simple but frequently misunderstood question: who is responsible for what?

The provider is generally responsible for:

• Physical data centre security
• Hardware and host infrastructure
• Network infrastructure and virtualisation layer
• Patching the underlying cloud platform

The customer is generally responsible for:

• Data classification and encryption choices
• Identity and access management (IAM) configuration
• Network security groups and firewall rules within their environment
• Operating system, application, and workload patching (for IaaS)
• Monitoring, logging, and incident response for their own environment

The exact split shifts depending on the service model. In Infrastructure as a Service (IaaS), the customer manages more of the stack. In Software as a Service (SaaS), the provider manages more, but the customer is still responsible for who gets access and what data goes in.

Why this model gets misunderstood

Most failures happen at the boundary line, not deep inside either party's territory. Teams assume a control is "provider-side" when it's actually theirs to configure, and that assumption is exactly where breaches originate. SentinelOne's research puts the human error rate behind cloud incidents at 95%, which reflects organisations not fully holding up their side of this model, rather than providers failing to secure their infrastructure.

The Numbers Behind the Urgency

If misconceptions are the cause, the following figures are the effect:

• 80% of organisations reported at least one cloud breach in the past 12 months.
• 82% of breaches involve cloud-stored data.
• Cloud environment breaches increased 75% between 2022 and 2023.
• 23% of cloud security incidents stem directly from misconfigurations.
• The average data breach now costs organisations $4.35 million.

These aren't hypothetical risks reserved for enterprises with sprawling infrastructure. They're the baseline reality for any organisation storing data or running workloads in the cloud today, which, in 2026, means nearly every organisation.

Closing the Gap: What Good Cloud Security Looks Like

Understanding the shared responsibility model is the starting point, not the finish line. Organisations that work with an experienced security consultancy to reduce cloud risk effectively tend to do a few things consistently:

1. Map ownership explicitly. Document, control by control, whether it sits with the provider or the customer, rather than relying on assumption.
2. Automate configuration checks. Manual audits can't keep pace with how fast cloud environments change; continuous scanning catches drift before attackers do.
3. Apply least-privilege IAM. Wildcard permissions and unused access rights are among the most common, and most preventable, entry points.
4. Treat logging and monitoring as non-negotiable. You can't respond to what you can't see.
5. Revisit responsibility boundaries per service. IaaS, PaaS, and SaaS all shift the line differently, so a policy written for one won't automatically cover the others.

Frequently Asked Questions

Is the cloud less secure than on-premises infrastructure? No. Cloud providers typically invest far more in physical and infrastructure-level security than most individual organisations could on their own. Most cloud security failures happen above that layer, in how the customer configures access, data, and monitoring.

What is the biggest cause of cloud security incidents? Misconfiguration caused by human error. Industry research consistently attributes the large majority of cloud security incidents to configuration mistakes rather than flaws in provider infrastructure.

Who is responsible for data security in the cloud, the provider or the customer? Under the shared responsibility model, the customer is almost always responsible for their own data: how it's classified, encrypted, accessed, and who can reach it. The provider secures the infrastructure the data sits on.

Does using multiple cloud providers reduce risk? Not automatically. Multi-cloud strategies can improve resilience, but they also increase complexity and the number of configurations that need to be managed correctly, which is why many organisations struggle to maintain consistent controls across providers.

Understand your cloud security responsibilities

Knowing where your organisation's responsibility begins, and where the provider's ends, is the difference between assuming you're protected and actually being protected. If you're not certain where that line sits in your own environment, now is the time to find out.