From the surface, everything may appear to be running smoothly.
Your clients are happy. Your staff is productive. Tax season is behind you, and your systems seem to be working just fine.
But the greatest cyber liability risks rarely begin with obvious warning signs.
Much like sharks beneath calm water, today's cyber threats often remain invisible until money is transferred, client information is exposed, or critical systems stop working.
Summer is one of the busiest seasons for cybercriminals. Employees take vacations, approval processes change, and firms often rely on temporary or cross-trained staff. Those changes create opportunities for attackers.
The good news?
Most of these risks can be reduced once you know where to look.
What Is Cyber Liability?
At MTS Consulting Group, we define cyber liability as the business, legal, regulatory, and operational responsibility your accounting firm has for protecting client information and demonstrating that your security controls are working every day.
Cyber liability isn't just about compliance.
It isn't just about cyber insurance.
It's about protecting your reputation, your clients, and your ability to continue serving them when unexpected events occur.
1. Business Email Compromise (BEC): The Cyber Threat That Looks Legitimate
One of the fastest-growing threats facing accounting firms is Business Email Compromise (BEC).
Unlike traditional hacking, BEC attacks often involve no malware at all.
Instead, cybercriminals impersonate someone your employees already trust.
Examples include:
- A vendor requesting updated payment information.
- A managing partner approving an urgent wire transfer.
- A client asking for sensitive tax documents.
- A supplier changing banking instructions.
Everything appears normal.
Until the money is gone.
Vacation season makes these attacks even more effective because financial approvals are often delegated to employees unfamiliar with regular payment patterns.
Best Practice
Before changing payment information or sending funds, verify every request using a trusted phone number already on file.
One simple verification process can prevent most BEC attacks.
2. Phishing Attacks Target Busy Employees—Not Inexperienced Ones
Many people believe phishing succeeds because employees lack training.
That's only part of the story.
Today's phishing attacks succeed because people are busy.
Attackers deliberately create urgency.
Examples include:
- Password expiration notices
- Microsoft 365 login alerts
- Unexpected MFA requests
- Payroll notifications
- Urgent client emails
- Wire transfer approvals
The objective is simple:
Get someone to react before they think.
That's why creating a security-conscious culture is just as important as deploying security software.
Encourage employees to slow down whenever something feels unusual.
Questions should always be welcomed.
Verification should never be viewed as wasting time.
A few extra seconds today can prevent weeks of disruption later.
3. Vendor Risk Has Become One of the Largest Sources of Cyber Liability
Modern accounting firms depend on dozens of technology partners.
Examples include:
- Tax preparation software
- Cloud storage providers
- Managed IT providers
- Payroll services
- Client portals
- Document management systems
- Financial software integrations
Every connection introduces another potential pathway into your environment.
This is known as supply chain cyber risk.
Your firm remains responsible for protecting client information—even when a third-party vendor is involved.
Every accounting firm should know:
- Which vendors can access client information.
- Which systems they can reach.
- What security requirements those vendors follow.
- Who internally owns each vendor relationship.
Clear answers reduce cyber liability and make cyber insurance renewals significantly easier.
Why Summer Is the Perfect Time for a Cyber Liability Review
Most cyber liability doesn't result from broken technology.
It comes from business changes that were never reviewed.
Summer provides the perfect opportunity to evaluate:
- Employee access permissions
- Vendor relationships
- Email security
- Backup testing
- Multi-factor authentication (MFA)
- Endpoint Detection and Response (EDR)
- Incident response procedures
- Written Information Security Plan (WISP)
- Cyber insurance readiness
These reviews help demonstrate operational proof for insurers, clients, auditors, and regulators while strengthening your firm's overall resilience.
Frequently Asked Questions
What is Business Email Compromise (BEC)?
Business Email Compromise is a cyberattack in which criminals impersonate trusted individuals or organizations to convince employees to transfer money or sensitive information.
Why are accounting firms targeted by phishing attacks?
Accounting firms manage financial transactions, tax records, banking information, and personally identifiable information, making them attractive targets for cybercriminals.
What is supply chain cyber risk?
Supply chain cyber risk refers to the cybersecurity exposure created by third-party vendors, cloud providers, contractors, and software integrations that have access to your systems or client data.
How can accounting firms reduce cyber liability?
Accounting firms can reduce cyber liability by reviewing access permissions, implementing MFA and EDR, testing backups, managing vendor access, training employees, maintaining a current WISP, and documenting operational proof for insurers and regulators.
Your Cyber Liability Should Never Be Left Beneath the Surface
The most dangerous cyber risks are often the ones that quietly develop over time.
You don't need to become a cybersecurity expert to protect your firm.
You simply need visibility, a practical plan, and evidence that your safeguards are working.
That's exactly what we help accounting firms build every day.
Schedule Your Complimentary Discovery Call
Wondering where hidden cyber liability may exist inside your accounting firm?
Let's find out together.
During our complimentary 10-minute Discovery Call, we'll discuss your current environment, identify potential areas of exposure, and outline practical next steps to strengthen your firm's cyber resilience.
No scare tactics.
No confusing technical language.
Just practical guidance designed to help you protect your clients, reduce cyber liability, and confidently answer your next cyber insurance questionnaire.
Schedule your complimentary Discovery Call today:
👉 https://mtsconsultinggroup.com/discovery-call
MTS Consulting Group — Your Beacon in the Cyber Storm.
