Vendor privileged access management and the third-party trust gap

At a glance

What this is: This is an analysis of vendor privileged access management and the finding that unmanaged third-party access materially increases breach risk, especially when privileged remote access is required.

Why it matters: It matters because IAM, PAM, NHI, and human access programmes all have to govern external identities that sit outside normal employee controls but still touch critical systems.

By the numbers:

• In healthcare, 56% of organizations experienced a third-party related breach within the past year.
• Roughly two-thirds expect the number of data breaches to rise over the next 12 to 24 months.

👉 Read Imprivata's analysis of vendor privileged access management and third-party risk

Context

Vendor access management exists to control how third-party vendors reach internal systems, especially when they need privileged remote access to maintain software, infrastructure, or specialised equipment. The primary security problem is not the vendor relationship itself, but the fact that external identities often sit outside the organisation’s normal authentication, device, and network controls.

In practice, this creates a governance gap across PAM, Zero Trust, and lifecycle management. When access is granted through shared accounts, persistent credentials, or manual approvals, organisations lose the ability to prove who used which privilege, for what purpose, and for how long. That is why vendor access must be treated as a governed identity class, not just as remote support.

Key questions

Q: How should security teams govern vendor access to critical systems?

A: Treat vendor access as a privileged identity lifecycle, not a remote support exception. Give each external user a unique identity, scope access to a named task, require approval before elevation, and revoke privileges when the session ends. That model reduces standing access and makes accountability traceable across PAM, IAM, and audit processes.

Q: Why does vendor access increase breach risk compared with internal access?

A: Vendor access often sits outside normal device, network, and authentication controls, yet it still reaches high-value systems. That mismatch makes it easier for compromised credentials or overbroad permissions to be abused without the same detection and policy enforcement that apply to employees.

Q: What breaks when third-party privileged access is not monitored?

A: Without session monitoring and audit logs, security teams lose the ability to prove what happened during a vendor session. That makes investigation, containment, and compliance far harder, especially when the external user has access to production systems or administrative functions.

Q: Who is accountable when a vendor account is misused?

A: Accountability should sit with the business owner of the access, the system owner, and the security team that approved the entitlement. If the relationship is governed well, the vendor can be identified, the session can be reconstructed, and the approval path can be reviewed against policy.

Technical breakdown

Brokered vendor sessions and credential mediation

Vendor access management platforms typically do not hand credentials directly to third parties. Instead, they broker a session through a portal or gateway, retrieve secrets from a vault, inject them into the session, and log activity for audit. This architecture reduces direct credential exposure and creates a control point for identity verification, session start, and session termination. The security value comes from mediation, not convenience: the platform becomes the enforcement layer between the vendor and the asset.

Practical implication: route vendor access through a brokered session model so credentials are never exposed to the external user.

Just-in-time privilege for external identities

Just-in-time access is the operational answer to standing privilege risk. Rather than leaving elevated permissions active all the time, the system grants them only when a request is approved or policy conditions are met, then revokes them at session end. For vendor access, this matters because the external identity is not continuously supervised the way an internal user might be. JIT reduces the window in which misuse, replay, or credential theft can be weaponised.

Practical implication: replace persistent vendor admin accounts with task-scoped access that expires automatically.

Session monitoring, audit logs, and accountability

Vendor access becomes a governance problem when organisations cannot reconstruct what happened during a privileged session. Real-time monitoring, session recording, and audit logs create the evidence trail needed to investigate misuse, validate approvals, and support compliance. These controls also reveal whether access patterns match the approved task or drift into unrelated systems. Without this evidence layer, organisations may know a vendor connected, but not what they actually did.

Practical implication: require session recording and audit retention for all third-party privileged activity.

Threat narrative

Attacker objective: The objective is to exploit trusted vendor access as a hidden route into internal systems and use it to expand reach, steal data, or disrupt operations.

1. Entry occurs when a vendor receives privileged access through remote administrative pathways that are not tightly segmented from internal systems.
2. Escalation happens when standing credentials, shared accounts, or weak approval controls allow that vendor access to be reused beyond the intended task.
3. Impact follows as the external identity can move laterally through systems, access sensitive infrastructure, or support a supply chain compromise.
4. The attacker’s objective is to use trusted third-party access as a legitimate-looking path into critical systems with high privilege and low scrutiny.

Breaches seen in the wild

• LiteLLM PyPI package breach — LiteLLM PyPI supply chain attack, credentials stolen from users.
• Shai Hulud npm malware campaign — Shai Hulud campaign: npm malware exposed secrets on GitHub.

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

NHI Mgmt Group analysis

Vendor access is a privileged identity class, not a connectivity feature. The article is correct to frame vendor access as a governance problem because external users often need elevated access while remaining outside the organisation’s direct control plane. That combination makes identity proof, session containment, and accountability the real control surface. Practitioners should stop treating third-party access as a remote support exception and govern it as a high-risk identity population.

Standing vendor privilege is the failure mode that turns convenience into exposure. The article shows that persistent administrative access creates the condition for misuse, even when the vendor relationship is legitimate. The issue is not vendor intent, but access that survives beyond the task and remains available for abuse. Practitioners should read this as a lifecycle failure, not just a PAM gap.

Session mediation creates evidence, but evidence is only useful if access is already scoped correctly. Recording and auditing are necessary for accountability, yet they do not solve overbroad entitlements or weak approval logic. The control model must begin with least privilege, then add mediation and observability. Practitioners should evaluate vendor access stacks by how tightly they constrain scope before they focus on how well they log activity.

Vendor privileged access management is becoming the control bridge between PAM, Zero Trust, and NHI governance. Third-party identities behave like non-human identities in the sense that they are external, task-bound, and often credential-driven, but they still need human accountability and lifecycle offboarding. That is why this category is moving from a support function to a core identity control layer. Practitioners should align vendor access with the same governance rigor used for service accounts and other externalised identities.

From our research:

• Only 1.5 out of 10 organisations are highly confident in their ability to secure NHIs, compared to nearly 1 in 4 for securing human identities, according to The State of Non-Human Identity Security.
• A separate finding shows that 85% of organisations lack full visibility into third-party vendors connected via OAuth apps, which reinforces how external identity sprawl weakens governance.
• That same research also found that 1 in 4 organisations are already investing in dedicated NHI security capabilities, which points readers to Ultimate Guide to NHIs , Lifecycle Processes for Managing NHIs for lifecycle controls.

What this signals

Vendor access is converging with non-human identity governance. The operational pattern is the same even when the subject is human: externally controlled identities, short-lived privilege, and weak visibility create the same governance pressure that NHIs already place on IAM teams. Organisations that still treat third-party access as a separate support problem will keep missing the structural link between access scope, accountability, and offboarding.

Standing privilege creates a control debt that shows up later in incident response. Once vendor access is allowed to persist, every investigation becomes harder because teams must reconstruct approvals, session scope, and actual activity after the fact. The practical signal is clear: if you cannot answer who had access, to what, and for how long, your access programme is not mature enough for externalised identities. For a broader framework view, the Top 10 NHI Issues and NIST Cybersecurity Framework 2.0 remain useful reference points.

For practitioners

• Eliminate shared vendor admin accounts Assign each third-party user a unique identity, then tie access to a named person, approved system, and approved task so you can revoke it cleanly when the engagement ends.
• Move vendor privilege to task-scoped approvals Require just-in-time elevation for remote support, with policy conditions based on system criticality, request reason, and ticket linkage rather than standing access.
• Record every privileged third-party session Capture session video, commands, and audit logs for all external administrative activity, and retain the evidence long enough to support incident review and compliance checks.
• Segment vendor reach from internal operator access Use network segmentation and system-level allowlists so external access can only reach the exact assets approved for the current work order.

Key takeaways

• Third-party access becomes dangerous when organisations allow external identities to operate with persistent privilege and weak visibility.
• The scale of the problem is material, with healthcare research in the source article citing a 56% third-party breach rate in the past year.
• The most effective containment starts with task-scoped access, session mediation, and clean revocation at the end of the engagement.

Key terms

• Vendor Privileged Access Management: Vendor privileged access management is the controlled granting, monitoring, and revocation of elevated access for third parties such as contractors, suppliers, and service providers. It combines identity proofing, session mediation, auditability, and least privilege so external users can perform work without inheriting standing administrative access.
• Session Brokering: Session brokering is the pattern of placing a control layer between the external user and the target system. The broker authenticates the user, retrieves credentials from a secure store, injects them into the session, and records activity, which reduces direct secret exposure and improves accountability.
• Just-in-Time Privilege: Just-in-time privilege is a time-bound access model that grants elevated rights only when a specific task or approval condition is met. For vendor access, it matters because the external identity should not carry persistent administrator rights between jobs or after the support session ends.
• Standing Privilege: Standing privilege is access that remains active continuously instead of being created on demand. In vendor and non-human identity environments, it increases the attack surface because compromise, reuse, or misuse can occur long after the original business need has ended.

Deepen your knowledge

Vendor access management and privileged third-party access are core topics in our NHI Foundation Level course, the industry's only accredited NHI security programme. If you are building a governance model for external identities, it is worth exploring.

This post draws on content published by Imprivata: vendor privileged access management and third-party access control. Read the original.