Insights · Threat Intelligence · 6 min read · 2026-06-12

Third-Party Vendor Risk: How Privileged Access Becomes the Real Attack Path

The attack that hit three financial services firms last quarter started the same way: a single unmonitored vendor with privileged access and no behavioral baseline.

By Alexander Morrow, Founder & CEO · Blackbox Intelligence Group

The pattern we keep seeing

Vendor integrations are rarely malicious on day one. They become dangerous when access persists after the project ends, credentials are shared across environments, and nobody owns ongoing monitoring.

Three red flags in every vendor review

1) Standing privileged access with no expiration or review cadence. 2) Vendors using personal email for MFA recovery on production systems. 3) No logging on what the vendor actually touched — only that they logged in.

What to do in the next 30 days

Inventory vendors with production access. Require time-bound access for every integration. Add session logging and quarterly re-certification. Run a focused assessment on your top five vendors by privilege level before your next audit or renewal.