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How to Manage Third Party Cyber Security Risks

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If your third-party cyber risk strategy stops at “collect questionnaires and vendor contracts,” you are exposed in ways you have not even measured yet.

We see this failure repeatedly: organizations believe that filling out spreadsheets and collecting attestation letters counts as risk management. That mistake turns vendors into blind spots — and blind spots get exploited quickly.

At Mindcore Technologies, we have managed risk in environments where malicious actors leveraged trusted third parties to gain footholds. That changes how we approach third-party cybersecurity: we don’t just assess risk. We measure, monitor, enforce, and respond.

War Story: What Happens When Third-Party Security Is Ignored

In a recent engagement, a regional enterprise lost sensitive data because a vendor with broad API access was compromised. This wasn’t due to a direct attack on us — it was a third party with insufficient security controls. The breach went unnoticed for weeks because the organization had no continuous monitoring of vendor access or activity.

This is not unique — it’s expected when third-party risk is only assessed once and never validated again. Contracts don’t stop exploitation — controls do.

Why Traditional Approaches Are Inadequate

Typical third-party risk programs rely on:

  • Annual questionnaires
  • Self-attested compliance documents
  • Static spreadsheets
  • Compliance checkboxes

But these do not tell you whether a vendor can actually access your systems, how they behave when connected, or whether their security controls hold up under real-time conditions.

IT Managers and CISOs should know this: a vendor with access is as dangerous as an internal user if left unchecked. This requires real operational discipline, not symbolic compliance.

What Real Third-Party Cybersecurity Risk Management Looks Like

Managing third-party risk should not be a one-time effort. It must be a continuous operational discipline that ensures each vendor:

  1. Is authorized before any access is granted
  2. Has least-privilege and time-bounded access
  3. Is visible in real time, not just in a spreadsheet
  4. Is monitored and logged like internal systems
  5. Is part of your incident response plan

Here’s how we do this at Mindcore Technologies.

1. Establish Identity-Driven Access Boundaries

Uncontrolled vendor access is one of the biggest threats we see.

We enforce:

  • Identity and access controls for every vendor connection
  • Least privilege policies — only the minimum necessary rights
  • Multi-factor authentication, even for vendor sessions

If a third party can access your systems without identity enforcement, they can pivot to internal assets just like a threat actor — because that’s exactly what happens when a vendor is compromised.

2. Continuous Monitoring and Contextual Alerts

Most organizations treat vendor access logs like archive data — stored and forgotten.

We operate differently:

  • Vendor access and activity are monitored in real time
  • Alerts are prioritized based on threat context
  • Patterns of session activity are correlated with behavior baselines

This ensures that anomalies — such as unusual access times, unexpected data queries, or privilege escalations — don’t go unnoticed.

3. Segmentation of Vendor Access Zones

Flat networks with vendor access are unacceptable.

We design network and access segmentation that:

  • Isolates vendor connections to defined zones
  • Prevents lateral movement beyond what’s strictly required
  • Applies policy controls based on risk

This reduces the blast radius when a third party is compromised.

4. Contract Controls Are Not Enough — Technical Enforcement Is

Contracts promise compliance; controls enforce it.

We align technical controls with contractual requirements by:

  • Validating vendor encryption standards in practice
  • Confirming logging meets your retention policies
  • Ensuring MFA and identity policies are actually implemented
  • Proving access rights are restricted as stated

This turns words on paper into enforced controls in action.

5. Integrate Vendors Into Incident Response and Playbooks

If a vendor becomes the source of a breach, your organization must respond immediately.

We integrate vendor considerations into incident response plans so that:

  • Vendor access can be suspended instantly
  • Forensic logging is retained and accessible
  • Containment controls activate automated segmentation
  • Notifications to stakeholders are prompt and compliant

Vendor access should never be a surprise in a response scenario.

What Mindcore Technologies Does Differently

At Mindcore Technologies, we treat third-party security as part of your defensible security posture, not an afterthought.

Our approach includes:

  • Identity-centric access governance that includes vendors
  • Real-time monitoring and contextual alerting for all third-party access
  • Network segmentation that prevents lateral movement
  • Integration of third parties into incident response plans
  • Continuous validation of vendor controls
  • Technical enforcement of contractual requirements

This turns external relationships from risk vectors into managed intersections of trust.

Actionable Steps You Can Take Today

If your third-party risk program feels like compliance theater, take these steps:

  • Stop relying on questionnaires alone — require identity controls
  • Treat vendor access logs as an operational telemetry source, not archive data
  • Segment vendor sessions from core assets by default
  • Validate controls with live testing or automated tooling
  • Integrate vendor access into your incident response and playbooks
  • Measure and act on vendor risk as continuously as internal risk

If your current provider cannot support these practices, they are part of the risk — not part of the solution.

Final Thought

Third-party risk management is not a process you “set and forget.” It is an operational discipline that must be measured, monitored, and enforced with the same rigor as internal risk.

At Mindcore Technologies, we embed third-party access into our broader managed IT and cybersecurity services so that vendors are governed, monitored, and accountable — not blind spots waiting to be exploited.

This is what real third-party cybersecurity risk management looks like.

Matt Rosenthal Headshot
Learn More About Matt

Matt Rosenthal is CEO and President of Mindcore, a full-service tech firm. He is a leader in the field of cyber security, designing and implementing highly secure systems to protect clients from cyber threats and data breaches. He is an expert in cloud solutions, helping businesses to scale and improve efficiency.

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