Zero Trust: Why Trust is Your Biggest Cyber Vulnerability — and How to Reduce Your Risk

September 30, 2026

By Edward Cooney, MBA, CCIC

The perimeter is gone and trust is the new vulnerability.

• The good news: You have implemented strong password policies, multi-factor authentication and regular employee cybersecurity training.
• The bad news: Those protections are no longer enough. Trust is the new vulnerability.

Traditional cybersecurity was built like a castle: protect the perimeter and trust what’s already inside. But today, the network is everywhere — cloud applications, remote users, mobile devices, vendors and connected systems.

“Zero trust” changes the mindset from “trust but verify” to “never trust, always verify.” Instead of assuming someone or something is safe because they are inside the network, zero trust continuously verifies identity, device health, access rights and risk.

The three core principles of zero trust are simple:

1. Continuous verification: Always verify who or what is requesting access.
2. Least privilege: Give users and devices only the access they need, and only when they need it.
3. Micro segmentation: Divide networks and systems into smaller zones so a compromise in one area doesn’t provide access to everything else.

No More Skeleton Keys

A single password or compromised account shouldn’t act like a skeleton key to the entire organization. Zero trust replaces broad, permanent access with precise, conditional access, such as:

• Multifactor authentication:Systems require a password plus a temporary biometric scan or hardware token every time you log in.
• Device health checks:A corporate laptop is blocked from accessing the company database if its antivirus software is outdated.
• Just-in-time access:An IT administrator receives temporary, one-hour access to a server to fix a bug.
• Microsegmentation:A company isolates its payment processing system from the network, ensuring a stolen device cannot access financial data.
• Context-based access:A system allows access from a worker’s usual city but instantly blocks a login attempt from a foreign country five minutes later.

Put Policies in Place to “Lock the Doors”

Recent attacks on water utilities demonstrate an important lesson. A compromised account doesn’t have to become a compromised organization. Three key policies that can help protect against widespread impact include:

1. Segment critical systems: Preventing attackers from moving laterally is an important safeguard. For example, separating finance, billing, HR, administrative and operational technology environments limits lateral movement if one area is compromised.
2. Restrict access privileges: Define who can access sensitive systems and grant only the permissions needed. This may receive initial pushback from users, but that is a change management issue — not an indication that the approach is wrong.
3. Strengthen transaction verification along with network segmentation: Use multiple verification steps for financial activity to reduce the risk of attackers manipulating banking processes or redirecting funds to their account of choice.

Where Are You on the Zero Trust Maturity Scale?

The zero trust maturity scale developed by the Cybersecurity and Infrastructure Security Agency (CISA) provides a clear roadmap for implementing the pillars of zero trust: Identity, Devices, Networks, Applications and Workloads, and Data. The four maturity levels are:

1. Traditional (Manual and Siloed): Access is set up once and rarely reviewed. Security tools operate separately and incidents are handled manually.
2. Initial (Starting to Automate): Some access decisions and security processes are automated. Least-privilege access is becoming standard.
3. Advanced (Automated and Coordinated): Security controls work together. Access considers risk and device security, while incidents are handled using established playbooks.
4. Optimal (Continuous and Adaptive): Access is granted only when needed and adjusts automatically based on real-time risk. Everything is continuously monitored and validated.

Adoption varies widely by sector and organization size, but a common pattern holds. Most organizations have cleared the first level and are starting on the second. Few have advanced further. It is important to remember that every level can have many steps. So, the goal isn’t to do everything at once, but to plan what steps you can take now and into the future.

Challenges to Zero Trust Implementation

The most common challenges to implementing zero trust initiatives include aging technology, bifurcated network architecture, financial commitments and even the ability to find qualified security experts to support the process. But outside factors make the push to move zero trust forward urgent.

• Attackers are well-funded, sophisticated and financially motivated — and that motivation isn’t going away.
• AI is here to stay and becoming a bigger part of cybersecurity concerns. Attackers are now better, faster and stronger with these tools.
• Quantum computing will be able to break current cryptography. Although “Q-Day” is not anticipated for a few years, and full availability even later, this technology will break our current identity security models.

The Conner Strong & Buckelew Advantage

Zero trust isn’t a single project with a finish line — it’s an ongoing discipline. Understanding where your organization sits on the maturity scale is the first step toward closing the gaps attackers are counting on. Our Cyber Center of Excellence team works alongside organizations to assess maturity, prioritize the highest-risk gaps and build a realistic roadmap forward — including insurance solutions to keep your organization protected from the potential fallout of a cyberattack. Connect with us today.