Module 6 · Cross-Account Attacks in AWS

Manish Garg
Manish Garg Associate of (ISC)² · RingSafe
Apr 19, 2026
3 min read
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Last updated: April 29, 2026

Multi-account AWS (or multi-subscription Azure / multi-project GCP) is the norm. Production in one account, staging in another, security tooling in a third, sometimes dozens of accounts across business units.

Multi-account AWS (or multi-subscription Azure / multi-project GCP) is the norm. Production in one account, staging in another, security tooling in a third, sometimes dozens of accounts across business units. Each cross-account boundary is a potential attack surface — and when misconfigured, a path from one compromised account to many.

Why multi-account

  • Blast-radius limitation — a compromised prod account shouldn’t affect staging
  • Compliance — isolate regulated workloads
  • Billing separation by team/product
  • Quota isolation
  • Principle of least privilege across teams
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