Why vendor trust is the new attack surface.
Hackers no longer break in. They log in through the people you already trust. Here is why vendor access is the fastest-growing risk inside modern enterprises.
For a long time, cyber security was a perimeter problem. You built walls, monitored the gates, and made sure nothing unexpected got inside. That model made sense when the people accessing your systems all worked for you.
That is not how companies operate any more. Every modern business runs on dozens — often hundreds — of third parties. They touch your data, your infrastructure, your customers and your finances. Most of them have standing access to systems that matter.
The shift nobody announced
Vendors are not a side channel any more; they are the main channel. A mid-sized company today typically relies on more external logins than internal ones. Every one of those logins is an identity your own security team did not issue and cannot fully see.
That is the shift nobody announced: the attack surface moved from your network to your relationships.
Trust is the control
Firewalls, MFA and endpoint agents still matter, but they stop at the perimeter of your own estate. Once a trusted third party is inside, those tools are quiet by design.
The new control plane is trust itself: who you work with, what they can reach, how often you check, and how quickly you can pull access when something changes. That is vendor risk management — and it is now a first-class security discipline.