Reimagining Supply Chain Exposure for the Speed of Modern Threats

No man is an island, 
entire of itself; 
Every man is a piece of the continent, 
a part of the main. 
– John Donne

Let’s face it, we have a gap in our cyber posture. Thirty percent of breaches originate from third parties, yet as organizations become increasingly exposed to supply chain attacks, they often lack the visibility, context, and workflows to detect and respond to them. Why?

On the surface, it cannot be a data problem, right? Most security teams are not short on data, and they fully understand how to operationalize threat intelligence, Indicators of Compromise (IoCs), vulnerabilities, malicious infrastructure, and active exploitation. True, they are often overwhelmed by the amount of data, but they have state-of-the-art SIEM, SOAR, XDR, EDR, and other 3-4-letter acronym platforms to filter through the data and take action only on alerts that matter.

But in reality, that’s only one part of the story. Modern SOC teams were designed to counter first-party threats, originating from APTs and other bad actors that intentionally target the organization, or from internal exposure within their own attack surface.

But the saying “No man is an island” should also apply to enterprises. No organization is an island; we are all part of the continent. Think of the latest Vercel breach. According to the company, it originated with the compromise of Context.ai, a third-party AI tool used by a Vercel employee. Vercel said the attacker used that access to take over the employee’s Google Workspace account, gain access to the employee’s Vercel account, pivot into a Vercel environment, and enumerate and decrypt non-sensitive environment variables.

This is not a unique scenario. Similar attacks have taken place against various companies in recent years. But it didn’t change the way organizations monitor supply chain risks and exposures. Most SOC teams today still find it challenging to monitor their vendors' attack surface for critical alerts and exposures. We’re working to change that.

The supply chain exposure visibility and remediation gap

For most SOC teams, critical supply chain threats often remain invisible, whether it’s:

• A critical supplier exposed through a newly exploited vulnerability
• A trusted SaaS or AI tool creating a path into the enterprise environment
• Vendor privileged credentials appearing in stealer logs
• An initial access broker advertising access tied to a third-party partner
• A ransomware group naming a vendor as a recent target before any formal customer notification is issued

And even if the SOC is somehow aware of these incidents, they lack an appropriate way to help the compromised vendor remediate and mitigate the threat. Third-Party Risk Management and GRC teams often own the vendor relationship. They know who to contact, how the vendor is governed, and what contractual expectations exist, but they are not usually built to validate technical threat signals, triage evidence, or drive urgent remediation.

That creates a practical gap. SOC teams have the insight, but can’t access vendors. TPRM teams have access but not always the technical capacity to act with urgency. The result is a delayed detection, slow vendor response, and difficulty proving that risk was actually reduced.

With Bitsight Beacon, our new Supply Chain Exposure Management offering, we decided to change this reality. We decided to reimagine a world in which cybersecurity operations teams can go beyond first-party visibility and extend their reach into critical vendors and suppliers. Our strategic vision was simple: Detect early. Validate threats. Remediate faster. Turn your vendor ecosystem into a visible, actionable attack surface.

Enter Mythos

The emergence of frontier AI cyber capabilities like Claude Mythos has shown us why our vision is essential for addressing modern cyber threats. As the UK DSIT recently noted, “Most successful cyber-attacks exploit simple weaknesses: outdated software, weak passwords, missing backups.” This raises a simple question: Can an AI-enabled attacker find and use a path through one of our vendors faster than we can detect, validate, and remediate it?

Unfortunately, the answer is yes. Over the last 12 months, more than 8 million compromised endpoints have been offered for sale on the dark web. These Initial Access Broker listings are at very low cost and in high volume, and provide a ready-made beachhead into vendor environments. Many of them are tied to privileged vendor access, including VPNs, Oktas, admin portals, ADFS, IT systems, and developer tools. Imagine what an AI-enabled attacker can do with these endpoints—in addition to exploiting critical CVEs and zero-days—and the impact it can have on supply chain risk.

The future of supply chain defense

This is where Bitsight’s new Supply Chain Exposure Management vision is critical. If we can identify exploitable conditions and breaches across vendors in real time, validate them quickly, and guide vendor remediation before an AI-enabled attacker can act on them, we can substantially help the SOC finally mitigate third-party risk.

At the same time, this does not mean to create yet another stream of alerts that nobody has time to process and would just add more chaos to an already chaotic situation. Instead of forwarding vague notifications or raw threat intelligence, teams could now act on curated findings that answer the common questions that vendors and internal stakeholders will ask:

• What happened?
• Which vendor is affected?
• Which assets or indicators are involved?
• Why does this matter?
• What should be remediated?
• How urgent is it?
• How do we track progress?

The future of supply chain security is no longer a fantasy. A new world is at our fingertips, and it is only the beginning. Talk to our team to learn more about what we’re working on.