Third-Party Breaches Without Breaches: How Attackers Use Trusted Access to Bypass US Enterprise Defenses

The modern enterprise is no longer breached in the traditional sense. Firewalls remain intact; endpoints appear compliant, and credentials are often never “stolen” in the usual way. Yet attackers still get in—and stay in. The difference lies in how trust is being weaponized. Threat actors are executing what looks like a supply chain attack without ever touching the actual supply chain infrastructure. Instead, they exploit the implicit trust organizations place in browsers, third-party services,