Why do default accounts and standing credentials keep showing up in breaches?

Because they remove friction for attackers and shorten the path from discovery to access. Default accounts often survive deployment, while standing credentials remain usable long after the original task or owner has changed. When those identities are not lifecycle-managed, they become reliable escalation paths in both cloud and operational environments.

Why This Matters for Security Teams

Default accounts and standing credentials are not just hygiene issues. They are durable access paths that often sit outside normal user lifecycle controls, which means they can outlive the system owner, the original deployment, or the project that created them. That makes them attractive to attackers who want a stable foothold, especially when secrets are reused, over-permissioned, or embedded in automation. NIST’s control baseline in NIST SP 800-53 Rev 5 Security and Privacy Controls is helpful here because it treats account and credential governance as an operational control problem, not a one-time setup task.

The real risk is not only compromise, but persistence. A default account may be created for convenience, then forgotten. A standing credential may be granted for a deployment, then left in place because no one owns the cleanup. In cloud estates, CI/CD pipelines, and service-to-service integrations, those identities can bypass the scrutiny applied to human users. This is why the issue shows up repeatedly in incident reviews, even when teams believe they have strong MFA or password policies elsewhere. In practice, many security teams encounter these access paths only after lateral movement or privilege escalation has already occurred, rather than through intentional lifecycle management.

How It Works in Practice

Attackers do not need sophisticated tradecraft when a default account is still enabled or a long-lived secret remains valid. The usual path is discovery, validation, and reuse. Once an account name, API key, certificate, or hardcoded token is found, the attacker tests whether it still works, whether it maps to a privileged role, and whether it can be used quietly. This is especially common in environments where secrets are stored in code repositories, deployment scripts, container images, or shared configuration files.

For security teams, the practical response is to treat these identities as managed assets. That means inventorying where they exist, assigning ownership, rotating or removing them, and enforcing expiry wherever possible. It also means distinguishing between human accounts and Non-Human Identity patterns, because service accounts and workload credentials often need different controls. The OWASP Non-Human Identity Top 10 is a useful reference for the failure modes that recur in machine-to-machine access.

• Replace vendor or platform defaults during deployment, not after go-live.
• Inventory standing credentials, including API keys, certificates, and service accounts.
• Bind each credential to an owner, purpose, and expiry date.
• Prefer short-lived tokens and just-in-time access for privileged operations.
• Monitor for unused, overbroad, or duplicated credentials across environments.

This issue is amplified when identity proofing and account issuance are weak, because orphaned or poorly attributed access can be difficult to trace. For human identities, guidance in NIST SP 800-63 Digital Identity Guidelines helps define stronger assurance around account creation and recovery, but it does not solve workload credential sprawl on its own. These controls tend to break down when identities are provisioned by multiple teams across hybrid estates because ownership and revocation paths become ambiguous.

Common Variations and Edge Cases

Tighter credential controls often increase operational overhead, requiring organisations to balance access speed against revocation certainty. That tradeoff is real in DevOps, industrial systems, and legacy platforms where changing default accounts or expiring secrets can disrupt automation. Current guidance suggests that the right answer is not to keep standing credentials indefinitely, but to engineer safer alternatives such as secret brokers, scoped tokens, or managed identities where the platform supports them.

There are also environments where the “remove it immediately” approach is not straightforward. Embedded systems, third-party appliances, and older OT components may ship with fixed administrative accounts or limited rotation capability. In those cases, compensating controls matter: network segmentation, restricted management planes, detection for abnormal use, and compensating approval workflows. The key question is whether the account is genuinely necessary and, if so, whether it can be constrained to the smallest possible trust boundary. Where human identities are involved, the expectation should be continuous verification rather than permanent reuse of the same credential.

Attackers increasingly combine stolen credentials with automation, including agentic workflows that can enumerate services and test access at scale. For that reason, the account itself is only part of the risk story. The surrounding governance, logging, and response capability matter just as much, particularly for internet-facing services and administrative interfaces. Recent reporting such as the Anthropic — first AI-orchestrated cyber espionage campaign report shows how quickly automated abuse can scale once access is obtained.

Related resources from NHI Mgmt Group

• Why do standing privileged accounts keep showing up in identity replacement projects?
• Why do stored credentials keep showing up in breaches?
• Who is accountable when orphaned accounts and stale NHIs keep showing up in audits?
• How do organisations keep AI agent credentials from becoming standing privilege?