Who is accountable when a printer holds credentials for multiple internal services?

Why This Matters for Security Teams

A printer that holds credentials for multiple internal services is not just a device problem. It is an identity ownership problem with operational, security, and governance impact. Once a printer can authenticate to file shares, print management, ticketing, or admin APIs, that identity becomes a shared control surface. NIST’s NIST SP 800-53 Rev 5 Security and Privacy Controls makes clear that account lifecycle, least privilege, and monitoring are governance responsibilities, not procurement afterthoughts.

This is where teams often misread accountability. The hardware owner may know where the printer sits, but the identity relationship spans IAM, the application owner, infrastructure, and security operations. If ownership is not explicit, credentials tend to outlive the business need, expand beyond the original scope, and remain invisible until a breach or audit exposes them. NHIMG’s Guide to the Secret Sprawl Challenge shows how quickly secrets become unmanaged when they are embedded into operational devices and shared workflows.

In practice, many security teams discover the accountability gap only after the printer has already been used as a quiet bridge into other internal systems.

How It Works in Practice

The accountable team is the one that can answer four questions: why the printer needs the access, which services it can reach, how the credentials are issued and rotated, and who is alerted when the identity behaves unexpectedly. That usually means shared accountability with a named technical owner, while the business system owners approve and review the access. The important point is that accountability follows the identity relationship, not the asset purchase order.

Good practice is to treat the printer as a non-human identity with a defined lifecycle. If the device authenticates to internal services, the credential should have a documented owner, a purpose, a scope, a review date, and a revocation path. Static shared passwords are a weak fit because they are hard to attribute and easy to overuse. Current guidance increasingly favors dynamic secrets and short-lived credentials for machine identities, especially when multiple services are involved. NHIMG’s Ultimate Guide to NHIs — Static vs Dynamic Secrets explains why TTL and rotation matter more when a device touches several internal systems.

Operationally, the control set should include:

• Named identity owner and business approver for each credentialed service.
• Unique per-device secrets instead of shared fleet-wide credentials.
• Rotation, expiration, and revocation tied to device lifecycle events.
• Logging for every service the printer reaches, not only the print queue.
• Periodic access review that checks both necessity and scope.

For implementation consistency, teams can map this to the OWASP Non-Human Identity Top 10 and the identity lifecycle expectations in NIST guidance. This breaks down in environments where legacy printers share a single embedded credential across multiple sites, because there is no clean way to attribute or revoke access without disrupting service.

Common Variations and Edge Cases

Tighter accountability often increases coordination overhead, requiring organisations to balance clear ownership against operational speed. That tradeoff becomes visible in mixed environments, especially when printers are managed by facilities or a managed print provider but authenticate into business applications owned elsewhere. In those cases, the device team can operate the asset, but it should not own the identity decisions alone.

There is no universal standard for this yet, but current guidance suggests separating three responsibilities: asset administration, identity governance, and service approval. If a printer uses a vendor-managed credential, the vendor may administer the device, while internal IAM retains authority over secret issuance and revocation. If the printer authenticates to sensitive systems, security should also require monitoring and alerting on unusual service access. This is especially important where the printer is effectively acting as a bridge into internal networks, because that makes the credential more than a convenience setting.

NHIMG’s Cisco Active Directory credentials breach is a reminder that once internal credentials are exposed, the real failure is rarely the device itself. It is the absence of clear lifecycle ownership. In mature environments, the question is not who bought the printer, but who can prove the identity is still needed, still scoped correctly, and still monitored.

Related resources from NHI Mgmt Group

• Who is accountable when an agentic system accesses credentials beyond its intended task?
• Should organisations prioritise external exposure or internal credential governance first?
• How do organisations reduce the dwell time of exposed credentials at scale?
• How should organisations stop auto-sync from turning desktops into repositories of credentials?