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25/06/2026 12:14 am
TL;DR: Law firms face a recurring breach pattern in which third-party vendors, remote support tools, VPNs, API keys, and file-transfer workflows create a broad entry surface for attackers, with third-party involvement appearing in about 30% of breaches according to the DBIR 2025. The real problem is not vendor access itself but governing it with explicit scope, traceability, and offboarding discipline.
NHIMG editorial — based on content published by Imprivata: third-party vendor access best practices for law firms
By the numbers:
- Third-party involvement in about 30% of breaches reflects the expanding supplier ecosystem.
- 47% of respondents experienced a data breach or cyberattack in the past year stemming from third-party vendors.
- A 2024 industry survey reported roughly 4 in 10 law firms experienced a security breach in the prior year.
Questions worth separating out
Q: How should law firms govern third-party vendor access without blocking operations?
A: Law firms should govern vendor access with task-specific entitlements, short-lived sessions, and full session attribution.
Q: Why do third-party vendor accounts create such a high breach risk?
A: Third-party accounts become risky when they inherit trust across VPNs, remote support tools, or file-transfer platforms and remain active after the original task ends.
Q: What breaks when vendor offboarding is not tied to identity lifecycle controls?
A: Dormant vendor accounts stay live, contracts end without revocation, and access becomes an orphaned pathway into sensitive systems.
Practitioner guidance
- Map every vendor access path to the data it can actually reach Inventory VPNs, remote desktops, API keys, file-transfer workflows, and support portals, then tie each path to the systems and client data classes it can reach.
- Split vendor entitlements by task, not by job title Create separate access profiles for maintenance, e-discovery, document handling, and file transfer so no single vendor account carries broad cross-functional privilege.
- Bind access expiry to contract expiry and inactivity Automate removal when a contract ends, when a service is retired, or when an account is unused for a defined operational threshold.
What's in the full article
Imprivata's full article covers the operational detail this post intentionally leaves for the source:
- A practical breakdown of eight vendor-access controls for law firms, including where each one fits in the access lifecycle.
- Examples of how to document due diligence, contract clauses, and pass-through obligations for third-party providers.
- Vendor access patterns such as self-registration, credential vaulting, and session recording that implementation teams will need to evaluate.
- The source's product-specific description of how Imprivata structures vendor privileged access for privileged assets.
👉 Read Imprivata's guidance on securing law firm vendor access →
Vendor access in law firms: where IAM controls are breaking down?
Explore further
25/06/2026 9:06 am
Third-party access is only safe when it is continuously scoped, not merely approved. The article describes a control model where vendors need fast access, but the real risk emerges when that access persists beyond the task that justified it. In identity terms, this is a lifecycle failure, not just an access design issue. Firms should treat vendor access as a governed lifecycle with revocation, review, and traceability built into the operating model.
A few things that frame the scale:
- Two-thirds of enterprises have endured a successful cyberattack resulting from compromised non-human identities, with a quarter encountering multiple attacks, according to The 2024 ESG Report: Managing Non-Human Identities.
- Enterprises that have experienced a compromised NHI averaged 2.7 separate incidents in the past 12 months, which shows how identity failures cluster rather than stay isolated.
A question worth separating out:
Q: Who is accountable when a vendor compromise leads to client data exposure?
A: Accountability sits with the firm, because it chose the access model, approved the privileges, and is responsible for the resulting data exposure. Vendors may be contractually bound, but the firm still needs clear ownership for access review, incident response, and evidence preservation. Legal, security, and identity teams should share a documented control chain.
👉 Read our full editorial: Third-party vendor access is the law firm breach boundary
