Law firms are prime targets for cyberattacks. You handle privileged communications, financial records, intellectual property, and personally identifiable information every single day. Yet many firms still operate with security practices that belong in a different decade.
After working with dozens of legal practices, we see the same mistakes over and over again. Here are the five most common cybersecurity gaps in law firms — and exactly how to fix each one.
1. Weak Email Security
Email is the lifeblood of legal communication, and it is also the number one attack vector for law firms. Phishing emails impersonating clients, judges, and opposing counsel are alarmingly effective — especially when attorneys are moving fast between cases.
The problem goes deeper than just spam filters. Many firms still use basic email configurations without encryption, without multi-factor authentication, and without any email authentication protocols like SPF, DKIM, or DMARC.
How to Fix It
- Enable MFA on every email account — no exceptions, including partners and senior staff.
- Deploy advanced email filtering that scans attachments and links in real-time, not just against known signatures.
- Configure SPF, DKIM, and DMARC records to prevent domain spoofing and impersonation.
- Train staff quarterly on phishing identification with simulated attacks.
2. No eDiscovery Readiness Plan
When litigation requires electronic discovery, firms without a plan scramble. Data is scattered across personal drives, cloud platforms, and email archives with no consistent retention or indexing. This creates legal risk for your clients and operational chaos for your team.
Worse, if a firm cannot produce documents in a defensible manner, it exposes both the client and the firm to sanctions and malpractice claims.
How to Fix It
- Implement a document management system (DMS) like NetDocuments or iManage that indexes and retains files in a structured, searchable format.
- Establish data retention policies that define what gets kept, where, and for how long.
- Run annual eDiscovery readiness audits to ensure systems and processes are working as intended.
- Train paralegals and associates on litigation hold procedures and preservation obligations.
3. Unencrypted File Sharing
Sending case files via regular email attachments or consumer-grade file sharing services like personal Dropbox or Google Drive is shockingly common. These methods offer little to no encryption in transit or at rest, and they create no audit trail of who accessed what.
Bar associations across the country are increasingly issuing ethics opinions that require attorneys to take reasonable steps to protect client data — and unencrypted file sharing does not meet that standard.
How to Fix It
- Use a secure client portal for exchanging documents with clients. Solutions like ShareFile or a properly configured SharePoint provide encryption and access logging.
- Enforce encrypted email for any messages containing privileged or sensitive information.
- Disable unauthorized cloud storage on firm devices so attorneys cannot use personal accounts for work files.
- Create a file classification policy so staff know which documents require encrypted handling.
4. No Legal Hold Procedures
When litigation is anticipated, firms have a duty to preserve relevant evidence. Without a formal legal hold process, critical data gets deleted through routine IT maintenance, automated email purges, or simple human error.
The consequences are severe: spoliation sanctions, adverse inference instructions, and potential malpractice liability. Yet many firms have no documented process for issuing, tracking, or releasing legal holds.
How to Fix It
- Document a formal legal hold policy that covers identification, preservation, collection, and release of relevant data.
- Use legal hold software or built-in features of your DMS to automate hold notices and track custodian acknowledgments.
- Coordinate with your IT provider to ensure backup and deletion schedules respect active holds.
- Train all attorneys on their obligation to initiate holds when litigation is reasonably anticipated.
5. Outdated Network Hardware and Software
Running a law practice on aging firewalls, unpatched servers, and end-of-life operating systems is like locking the front door but leaving every window open. Attackers actively scan for known vulnerabilities in outdated systems, and law firms with flat networks and old hardware are easy targets.
We regularly encounter firms running Windows Server versions that Microsoft no longer supports, firewalls with default passwords still in place, and switches that have not received a firmware update in years.
How to Fix It
- Inventory all hardware and software and check end-of-life dates. Replace anything that no longer receives security updates.
- Implement automated patch management so servers, workstations, and network devices stay current without manual intervention.
- Segment your network so a breach in one area cannot spread laterally across the entire firm.
- Schedule annual infrastructure reviews with your IT partner to plan upgrades before equipment becomes a liability.
The Bottom Line
Cybersecurity is not just an IT issue — it is an ethical obligation for every law firm. The ABA Model Rules require attorneys to make reasonable efforts to prevent unauthorized access to client information. These five fixes represent the baseline, not the ceiling.
If any of these gaps sound familiar, it is time to take action. A managed IT partner who understands the legal industry can help you close these vulnerabilities quickly and keep your firm protected as threats evolve.
Ready to assess your firm’s security posture? Contact us for a free cybersecurity risk assessment tailored to law firms.
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