Claims · 6 min read

5 reasons cyber claims get denied

Insurance only helps if it pays. The good news: the most common reasons a cyber claim gets denied aren't bad luck or fine-print trickery, they're conditions you can check and fix today.

Short answer: Most cyber claims are denied for reasons you can control: no multi-factor authentication, an unpatched known vulnerability, a voluntary funds transfer without the right endorsement, an excluded third-party vendor breach, or a security control you said you had but did not maintain.

1. No multi-factor authentication (MFA)

This is the big one. Many cyber policies now make MFA a condition of coverage for ransomware and funds-transfer claims. If you attested that you had it and you didn't, or you had it on email but not on remote access, the insurer can decline. MFA is cheap, fast to roll out, and the single highest-leverage thing you can do to keep your policy responsive.

Fix: turn on MFA everywhere that matters, email, banking, VPN/remote access, and admin accounts, and make sure your application answers match reality.

2. A known vulnerability you didn't patch

If attackers got in through a flaw that had a patch available and you hadn't applied it, that's a common denial ground. "We were busy" isn't a defence the policy recognizes.

Fix: enable automatic updates where you can, and retire end-of-life systems that no longer receive security patches.

3. Voluntary transfer of funds (without the right endorsement)

When an employee is tricked into sending money, a fake invoice, a spoofed CEO email, many policies treat it as a "voluntary" transfer and exclude it unless you've specifically added social-engineering coverage. People assume "fraud is fraud." The policy often disagrees.

Fix: confirm you have a social-engineering endorsement, know its sublimit, and add a simple internal rule: any payment change or new wire instruction gets verified by phone, using a known number, never the one in the email.

4. A third-party vendor breach the policy excluded

Your IT provider, payroll processor, or cloud vendor gets breached and your data goes with it. Some policies cover this; others exclude third-party/dependent breaches entirely, leaving you exposed for a failure that wasn't even yours.

Fix: check whether your policy extends to vendor incidents, and ask critical vendors whether they carry cyber coverage. You're only as protected as your weakest supplier.

5. You didn't maintain a control you said you would

Policies increasingly require you to keep certain safeguards in place, tested backups, endpoint protection, a defined process. If a claim reveals you let one lapse, that can be enough to deny. Insurers are auditing the application against reality more than they used to.

Fix: treat your application answers as ongoing commitments, not a one-time form. If something changes, tell your broker.

The takeaway: none of these denials are about exotic loopholes. They're about controls and wording you can verify before you ever file a claim. A policy that pays is a policy whose conditions you actually meet.

Frequently asked questions

What is the most common reason a cyber claim is denied?

Missing multi-factor authentication where the policy required it. It is the single most common technical reason a claim fails.

Can an insurer deny a claim for an unpatched system?

Yes. If a known vulnerability went unpatched and led to the incident, many policies allow the insurer to reduce or deny the claim.

Is wire fraud covered by cyber insurance?

Often only if social engineering or funds transfer fraud is specifically endorsed. A voluntary transfer tricked out of an employee may not be covered by default.

Make sure yours would actually pay

Tick the boxes on the free Coverage Gap Checklist, or have me read your wording and tell you exactly where a claim could be denied.

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By J.R. Genua, CCIS, Certified Cyber Insurance Specialist. Adapted from the free guide Cyber Risk & Canadian SMEs.