The Most Common Cloud Security Misconfigurations (and How to Avoid Them)

Cloud breaches are rarely caused by the cloud provider. AWS, Azure, and GCP secure the infrastructure underneath your account, the shared responsibility model puts identity, configuration, and data access squarely on the customer. In practice, that means most cloud incidents trace back to a small, recurring set of misconfigurations. Here are the ones we see most often.

1. Overly permissive IAM policies

Wildcard permissions (Action: "*", Resource: "*") get added during initial setup "temporarily" and never get scoped down. The result: a compromised low-privilege credential or a misconfigured service role can often escalate to full account control. The fix is unglamorous but effective, apply least-privilege from the start, and periodically audit for unused or overly broad permissions rather than assuming they'll get cleaned up later.

2. Publicly exposed storage

S3 buckets, Azure Blob Storage containers, and GCS buckets set to public read (often for a legitimate short-term reason) that never get locked back down. This is consistently one of the most common ways sensitive data ends up exposed, not through exploitation, just through configuration nobody revisited. Storage-level public access blocks (available on all three major providers) prevent this class of mistake outright, rather than relying on manual policy review to catch it.

3. Missing or misconfigured logging

CloudTrail, Azure Monitor, or GCP Audit Logs disabled, scoped too narrowly, or writing to a location nobody's watching. Without this, an incident becomes harder not just to detect, but to reconstruct after the fact. Logging that exists but isn't reviewed provides a false sense of coverage.

4. Excessive trust between accounts and environments

Cross-account roles, VPC peering, or shared credentials that let a compromise in a lower-trust environment (like staging) reach production. Environment separation only works if the trust boundary is actually enforced, a role that can be assumed from anywhere defeats the purpose of separating environments in the first place.

5. Default network exposure

Security groups or firewall rules left at overly permissive defaults, database ports open to 0.0.0.0/0, management interfaces reachable from the public internet. These are usually leftover from initial setup or debugging, not intentional, which is exactly why they're easy to miss without a structured review.

The common thread

None of these require sophisticated exploitation, they're configuration gaps that exist because cloud environments change constantly and manual review doesn't scale with that pace. That's the case for treating cloud security as a periodic review, not a one-time setup step.

Our Cloud Security service covers a structured review against AWS, Azure, and GCP best practices, or start with our free Domain Footprint Analyzer for a quick, passive look at your public-facing security posture. For the container-orchestration version of this same discipline, see our piece on Kubernetes and container security misconfigurations, and for how a single application bug can reach a cloud provider's own credential-issuing endpoint, see SSRF: the cloud-era vulnerability. For the AWS-specific version of this same discipline, see AWS IAM misconfigurations we keep finding.