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How to Prepare for the Biggest Cybersecurity Threats Facing Professional Services Firms in 2027

Cybersecurity vulnerabilities are easy to overlook, underestimate, or even ignore because they’re invisible. There are no physical doors and gates. Because they go mostly unnoticed, it is also easy to miss the glaring openings cyber attackers can walk through.


Security breach attempts, otherwise known as IPS (Intrusion Prevention System) events, have reached staggering numbers: 3 BILLION in our industry alone in the first half of 2026. Detailed reports paint an alarming picture: 72% of IPS events occur when attackers walk through digitally open doors, doors that can and should be closed. Don’t be the firm that leaves those openings in plain view for hackers.

WHAT CYBERSECURITY THREATS AFFECT PROFESSIONAL SERVICES FIRMS IN 2026?

These numbers indicate that our industry, in particular, urgently needs awareness to implement the necessary solutions. For context, our industry has the “largest attack...by...volume of any tracked industry,” making us a primary target. Let that sink in: what we do, and everything that entails, is a magnet, drawing bad actors to our privileged and valuable data. As primary targets, our cybersecurity plans need to become a much higher priority.

Our industry is experiencing breaches, data loss, and ransomware attacks on highly desirable data, and when they happen, they deliver massive financial, legal, and reputational risk, creating short-- and sometimes surprisingly long-term costs. When clients are lost, regulatory fines are imposed, and firms become more prone to repeated attacks, we need to strengthen our digital defences.

If those consequences don't motivate you to assess and improve your cybersecurity plan, also consider the regulatory obligations (and potential fines) in your area. For instance, ABA’s Model Rule 1.6, which regulates lawyers, states that they “must understand the risks... and take reasonable precautions.”

WHY ARE PROFESSIONAL SERVICES FIRMS BEING TARGETED AT THIS LEVEL?

There are two primary reasons that our industry is the most targeted. First, our industry, composed of law firms, accountancies, and MSPs (Managed Service Providers), has particularly enticing data. From financial data to transactions, and from opportunities to access client data, intellectual property, or an MSP's jackpot, the data available is a goldmine.

The crucial secondary reason is urgent, but, most importantly, fixable! As service providers, we have seen ourselves as a lower cyber threat than other industries. This has led to a seriously misguided reliance on unchanging or minimal IT maintenance instead of a robust cybersecurity plan. We can prevent the trend of “attackers...walking through the same unlocked doors.” We must change our thinking to keep ourselves, our clients, and our data safe.

Lastly, the nature of our services requires tools with open, vulnerable doors by design. This greatly increases the need and urgency to reassess our cybersecurity plan and design and guard those necessary access points as safely as possible, while effectively closing access where needed. If your firm suffers from a limited IT plan, or minimal cybersecurity, it’s time to replace a reactive cyber threat plan with a preventative one.

HOW ARE THESE FIRMS BEING TARGETED SO SUCCESSFULLY?

With over 20% of law firms breached in 2024 and 2025, and that number rising each year, we need to recognize the security gaps and vulnerabilities and fix them. The multiple methods that have been used for attacks can be boiled down to one general cause: it is simply “security misconfiguration.”

This means that whether cyber threats come from phishing, ransomware, compromised emails, or other methods, reports show that 74% of breaches involve human error, misuse of access, stolen credentials, and phishing; these are not digital technology errors. They are security gaps you can close.

One way attackers find more pathways to access your systems is through often-overlooked, vulnerable access points created by remote and hybrid work environments and devices. Our industry also relies on vulnerable-by-design tools, such as client portals, document management platforms, billing systems, and collaboration tools, which may be third-party tools and can exponentially increase the threat landscape.

3 ESSENTIAL DIGITAL SECURITY FACETS YOU MUST TARGET

Now that you are less likely to underestimate the potential for gaps in your network, your digital tools or the ways they are used to create openings for a cyber breach, here are the key facets to address your firm’s cyber protection needs:

1. Ensure you upgrade the level and amount of I.T. security standards for your firm’s network and systems. Basic monthly maintenance and monitoring plans cannot fill the numerous potential gaps.

2. Look for a plan that provides deep vulnerability assessments, continuous monitoring and testing, stringent training and compliance monitoring for staff, in addition to any incident response plans. From unpatched software to poorly configured or installed directories, to devices or tools not used securely by staff, look for cybersecurity specialists to address these and other gaps, then create and implement a preventative plan that continuously guards your data.

3. Copy the advice for law firms and “conduct thorough risk assessments for all third-party relationships and require vendors to adhere to strict cybersecurity standards.” Create secure pathways for these transmissions, since our industry’s basic functions rely heavily on file-sharing platforms and other common third-party tools. Close a wide range of digital doors by ensuring your in-house IT specialists, or a specialty IT cybersecurity service provider, know how to prevent attackers from using them to access your network.

A WORD ON THE CHANGING CYBERSECURITY-FRONTIER WITH A.I.

The new capabilities of A.I. will speed up, and therefore increase, the number of ISP events that quickly find and exploit digital gaps in your systems. Nevertheless, these gaps are predictable and preventable. At GLC, we are on the front lines, addressing our clients’ most urgent needs and will work with you to tackle your cybersecurity needs.

In our next edition later this month, we'll share more tips for tackling cybersecurity threats, especially as A.I. adds to the threat landscape.

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