Fractional CISO and AI Security for Law Firms
Law firms hold some of the most sensitive data there is and adopt AI quickly, yet rarely have a security leader in-house. Zero Day Security is that leader on a fractional basis.
A law firm holds privileged communications, deal documents, litigation strategy, and the personal data of clients who trust you to keep it. That makes the firm a high-value target. At the same time, lawyers are adopting AI drafting tools, research assistants, and legal-tech platforms faster than most firms can govern them. The gap between fast adoption and slow governance is where confidentiality and privilege are put at risk.
A fractional CISO is a senior security leader who owns your security program on a part-time, ongoing basis: setting policy, handling client assurance, and governing AI adoption, without the cost of a full-time executive hire.
What a fractional CISO does for your firm
Most firms do not need a full-time security executive, but they do need someone accountable for security decisions. Zero Day Security takes that seat. We set practical governance that fits how a firm actually works, we own the relationship with your client assurance obligations, and we make sure new tools are adopted with eyes open rather than discovered after the fact.
- Protect client confidentiality and privilege. Sensitive matters need controls that match their value. We map where privileged data lives, who can reach it, and where AI tools may be sending it.
- Handle the questionnaire flood. Client security questionnaires and outside-counsel guidelines arrive constantly. We answer them accurately and consistently so partners are not drafting security attestations between hearings.
- Adopt AI and legal-tech safely. We review the tools your lawyers want to use, govern how matter data flows into them, and let the firm move quickly without quiet surprises.
- Give you assurance you can show clients. When a client asks how you protect their data, you have a clear, honest answer and the evidence behind it.
AI that acts is the part most firms have not governed
The newest legal-tech tools do not just answer questions. They take actions: pulling from document stores, drafting filings, summarizing matters, and connecting to systems on a lawyer's behalf. AI that acts, not just answers, is one of the fastest-growing attack surfaces an organization faces. For a firm, the risk is that a tool with broad access touches privileged material in ways no one reviewed.
Discovering and scanning your AI tools shows what you have and where it is weak, but it stops nothing at runtime. Some of the hardest gaps here are architecture, not something a product fixes. We work against recognized references such as the OWASP Agentic Security Initiative, the OWASP LLM Top 10, and the NIST AI Risk Management Framework, and we tell you plainly when a problem has no product that solves it.
Diagnose first, then decide
We start by showing you what is actually wrong. The free AI Security Gap Assessment gives the firm a clear picture of where it stands across the domains that matter for AI adoption. From there, a fractional engagement is how the work gets done: governance written, questionnaires handled, tools reviewed, and a roadmap your managing partner can stand behind. We do not quote vendor statistics we cannot stand behind, and the assessment shows what is weak without selling a fix you do not need.
vCISO / Fractional CISO
Security leadership on a fractional basis.
Explore fractional CISO →Managed Security & MDR
Monitoring and response, run for you.
See managed security →Security Advisory & Assurance
Answer client questionnaires with confidence.
See advisory & assurance →AI Security Gap Assessment
See where the firm stands, free.
Run the assessment →Put a security leader in your corner
Talk to us about fractional CISO leadership for your firm, or run the free AI Security Gap Assessment first to see where you stand.