Zero trust network security tools still hinge on standing access

At a glance

What this is: This guide compares zero trust network security tools by category and argues that the persistent gap is standing access, especially for privileged infrastructure, databases, and internal applications.

Why it matters: IAM, PAM, and NHI teams need to separate true zero trust controls from tools that simply relabel persistent access, because standing privilege still drives breach blast radius and undermines least-privilege governance.

By the numbers:

• 22% of breaches involved credential abuse as the initial access vector.

Context

Zero trust network security tools are meant to remove implicit trust from access decisions, but that model fails if standing privileges remain in place beneath the policy layer. In practice, the issue is not only perimeter replacement, but whether access is time-bound, resource-specific, and revoked when the task ends, especially for cloud infrastructure and internal applications.

This article frames zero trust through the access problem that IAM, PAM, and NHI programmes must still solve: how to prevent persistent permissions from becoming the hidden exception inside a zero trust architecture. The category split matters because ZTNA, segmentation, privileged access, and just-in-time controls solve different parts of the governance problem.

For cloud-native and regulated environments, the practical question is whether the organisation has removed standing access or merely wrapped it in continuous verification language. The article’s core point is that zero trust becomes operational only when privilege is constrained at issuance, not just checked at connection time.

Key questions

Q: What breaks when zero trust IAM still allows standing privileges?

A: Standing privileges break the core zero trust assumption that access should be continuously evaluated and bounded to the current task. If the identity keeps broad permissions after login, one compromised credential can move across systems without a fresh authorization decision. The model becomes a trust-once design with better branding, not a real zero trust programme.

Q: Why do standing privileges increase breach impact in cloud and enterprise environments?

A: Standing privileges enlarge the attacker’s options because one exposed administrative path can be reused for lateral movement, persistence, or broad operational control. In cloud environments, that risk is worse when human admins and machine identities both retain long-lived elevation. The practical result is higher blast radius from a single compromise.

Q: How do teams know whether zero trust controls are actually reducing privilege?

A: A useful test is whether access disappears when the work is done. If privilege remains active after the task, the programme is monitoring access rather than reducing it. Teams should look for auto-expiry, resource-level scoping, and revocation that happens by design instead of manual cleanup.

Q: Should organisations prioritise just-in-time access over network segmentation?

A: They solve different problems, so the priority depends on the risk being reduced. If the issue is excessive entitlement to production systems, just-in-time access should come first because it removes privilege. If the issue is east-west movement after compromise, segmentation matters more. Many programmes need both, in different layers.

Technical breakdown

Why standing access survives zero trust tooling

Zero trust tooling is often described as continuous verification, but verification alone does not remove the underlying entitlement. If a user, workload, or service already has broad standing access, the control plane is only confirming that the session exists, not limiting what the identity can do once inside. That is why many programmes end up with identity-aware gateways or segmentation layers that still leave persistent privilege in place. The result is a control model that looks strict at the edge but remains permissive in the core.

Practical implication: treat standing access as a design defect in the access model, not as a policy exception to be tolerated.

Just-in-time access versus identity-aware network access

Just-in-time access tools and zero trust network access tools are related but not interchangeable. ZTNA changes where and how connections are allowed, usually by binding access to identity, device, and context. Just-in-time access changes whether privilege exists at all before the task begins, then removes it when the task ends. That distinction matters most for infrastructure, databases, and internal apps, where excessive standing permissions create more exposure than network location ever did. A zero trust stack that lacks JIT can still preserve privileged reachability.

Practical implication: map which controls reduce connectivity risk and which controls actually eliminate privilege persistence.

How blast radius is reduced in cloud and hybrid environments

The article repeatedly ties zero trust value to blast-radius reduction. That is not just about blocking traffic between segments. It is about constraining the scope of any compromised credential so that one stolen login does not expose production systems, sensitive databases, or internal tooling. In cloud-native and hybrid environments, that means pairing least-privilege policy with resource-level access, time limits, and automated revocation. Without those controls, zero trust becomes a label attached to the network layer while the identity layer still carries excessive reach.

Practical implication: evaluate zero trust programs by how much they reduce post-compromise reach, not by how many policy checks they add.

Breaches seen in the wild

• Snowflake breach: Snowflake breach compromised Ticketmaster, Santander and others via cloud credential abuse.
• Salt Typhoon telecom intrusions 2025: Salt Typhoon breached US telecoms mainly with stolen logins, then harvested SNMP strings and TACACS/RADIUS keys to spread and persist for years.

Read our 52 NHI Breaches Analysis report for a comprehensive view of breaches impacting Non-Human Identities including AI Agents.

NHI Mgmt Group analysis

Standing access is the control failure zero trust often leaves behind. The article’s central tension is that organisations can adopt zero trust language while still allowing broad, persistent permissions underneath it. That means the governance problem is not trust at login alone, but privilege that survives after the original need has passed. Practitioners should treat persistent access as the real exposure point, because that is where zero trust design usually stops short.

Just-in-time access is the decisive control boundary for modern infrastructure governance. Zero trust network access can narrow reach, but it does not by itself remove the entitlement state that attackers and overworked operators exploit. When the primary asset is production access, the meaningful distinction is whether access is granted only for the task or retained for convenience. That makes JIT and revocation lifecycle controls more important than branded zero trust claims.

Ephemeral credential trust debt: persistent permissions create governance debt because the organisation keeps assuming access can be reviewed later. That assumption breaks down when access is broad, distributed across cloud and internal systems, and left active for operational ease. The practitioner implication is to redesign programme ownership around issuance and expiry, not around static entitlement review.

Zero trust architecture must be judged by privilege shape, not by control count. A stack can include identity-aware access, segmentation, and continuous verification and still leave excessive standing access intact. That is why IAM, PAM, and NHI teams need a shared standard for what counts as removed privilege versus merely monitored privilege. The operating question is whether the programme shrinks what an identity can do when compromised.

Identity governance and zero trust are converging, but the convergence only matters if access becomes temporary. The article shows that the market is moving toward tool categories that solve distinct parts of the access problem. For practitioners, that means the architecture conversation should shift from whether zero trust is present to whether the programme actually enforces least privilege across human, machine, and service identities.

From our research library:

• 90% of IT leaders say properly managing NHIs is essential for a successful zero-trust implementation, according to the Ultimate Guide to NHIs.
• Read next: Ultimate Guide to NHIs — Static vs Dynamic Secrets

What this signals

Ephemeral credential trust debt: zero trust programmes often accumulate hidden risk when they leave broad access active and assume policy checks are enough. The governance fix is not another access review cycle alone, but a shift toward task-scoped issuance and automatic expiry that reduces what a stolen credential can do.

For IAM and PAM teams, the operational signal is simple: if the organisation cannot explain when a high-risk entitlement ends, it is not yet running a mature zero trust access model. That is where the access governance conversation should start, especially for cloud infrastructure and internal systems.

For practitioners

• Replace standing privileged access with JIT issuance Review production, database, and internal application access paths and move high-risk entitlements to time-bound grants that expire automatically after the task ends.
• Separate ZTNA from privilege reduction Map which access tools control connection path only and which ones actually remove persistent privilege, then close the gaps where network controls are masking standing access.
• Reclassify privileged access as a zero trust dependency Treat infra consoles, internal admin portals, and sensitive data stores as governance-critical access points, not just application connectivity problems.
• Audit break-glass and on-call pathways Check whether emergency access flows bypass ordinary entitlement expiry and whether those exceptions are logged, time-scoped, and reviewed separately.

Key takeaways

• Zero trust network security tools do not solve the access problem if standing permissions remain active underneath them.
• The article links credential abuse to breach exposure and argues that time-bound access is the practical control that changes the outcome.
• Practitioners should evaluate zero trust programmes by whether they remove privilege persistence, not by whether they add another verification layer.

Key terms

• Standing Access: Standing access is persistent privilege that remains available without fresh approval or contextual checks. In NHI environments, standing access usually appears as long-lived tokens, reusable service accounts, or broad roles attached to automation. It is convenient operationally, but it expands risk when conditions change or secrets leak.
• Just-in-Time Access Request: Just-in-Time Access Request is a pattern that grants access only when it is needed and only for the duration required. It reduces standing privilege by making access temporary, policy driven, and task scoped. This approach is especially useful for contractors, sensitive systems, and short-lived operational work.
• Zero Trust: A security model that assumes no identity, human or non-human, should be trusted by default, even inside a network perimeter. Every access request must be verified, authorised, and continuously validated.
• Blast Radius: The potential scope of damage if a specific credential or identity is compromised. Identities with broad permissions have a larger blast radius and represent a higher priority for least-privilege enforcement and security controls.

Deepen your knowledge

NHI governance, agentic AI identity, and machine identity lifecycle are core topics in our NHI Foundation Level course, the industry's only accredited NHI security programme. If you are building or maturing an IAM programme, it is worth exploring.