By Josh Neame, CTO, BlueFort Security
The Legal Sector at an Inflection Point
Across the UK legal sector, AI dominates the conversation. From document review and contract analysis, to research and litigation support, firms are embedding AI into workflows to drive efficiency. For many, this is both an opportunity and a structural shift promising productivity gains while challenging the traditional billable hour.
While firms focus on AI, a more immediate threat is already here: cybersecurity.
Cyber risk is not theoretical. It is accelerating and already impacting firms across the UK. Ransomware, data breaches, and business email compromise are operational realities in a sector built on confidentiality and trust.
The legal sector is balancing two parallel priorities: adopting AI and strengthening cyber defences. The risk lies not in innovation itself, but in allowing it to distract from immediate cyber threats. At the same time, firms are rethinking access to applications and data as users and workloads move beyond the traditional perimeter, making Zero Trust Network Access (ZTNA) foundational. Platforms like iboss, securely connect users to applications wherever they work, reducing attack surface while supporting the hybrid models now common across the legal sector.
Security, Productivity, and the Human Attack Surface
Cybercriminals are already using AI at scale. Spear phishing is more convincing, personalised, and difficult to detect, with attackers leveraging public data to craft credible messages. Deepfake voice and video add further realism.
Law firms are particularly exposed. Their work depends on trust, time‑sensitive communication and frequent document exchange; conditions that social engineering exploit.
The challenge is improving security without disrupting billable work. Every additional control risks friction; every gap increases exposure.
Zero Trust Network Access (ZTNA) technologies play a critical role here by enforcing context-aware access controls. Rather than granting broad network access via VPN, users are connected only to the specific applications they are authorised to use based on identity, device posture, and risk signals. This significantly reduces the blast radius of a compromised account, meaning that even if social engineering is successful, lateral movement within the environment is inherently constrained.
File-Borne Threats: The Trojan Horse Hiding in Plain Sight
Legal work runs on documents. Thousands of files move between firms, clients, and third parties every week. Any one of them can be weaponised.
Any file entering a law firm has the potential to become a Trojan Horse. Common formats such as Word and PDF are frequently used to deliver malicious payloads. Embedded macros, links or objects can execute code, enabling access, privilege escalation and lateral movement.
Detection-based tools cannot reliably catch every threat. With millions of new variants created each year, assuming detection alone is sufficient is unrealistic.
For law firms operating in a high-trust, document-intensive environment, file-borne threats represent a particularly acute exposure, one that sits directly at the intersection of productivity and risk.
This is where the convergence of file security and secure access becomes critical. While features like Content Disarm and Reconstruction (CDR) neutralise threats within files, Zero Trust architected platforms ensure that the channels through which those files are delivered; web traffic, cloud applications, and remote access pathways are equally controlled, inspected, and governed. Together, they address both the payload and the delivery mechanism of modern attacks.
Proactive Protection Without Productivity Trade-Offs
Content Disarm and Reconstruction (CDR) takes a different approach. Rather than attempting to detect threats, it assumes all files may be unsafe and rebuilds them in a safe format before delivery.
Think of this as zero trust for files. We’re becoming more familiar with zero trust principals and SASE/ZTNA architecture across the network layer (and to replace the traditional network boundary – that has all but dissolved in 2026). CDR takes this approach with files; never trust and always verify, or put more bluntly in the context of files, remove the active content, reconstruct imagery, ensuring the content of the file is delivered while removing the potential for threats to remain.
ZTNA solutions extend this zero-trust philosophy beyond files to user access itself. By brokering connections through a cloud-native architecture, they eliminate the need to place users directly on the network. Applications are effectively hidden from the public internet, reducing exposure to scanning, exploitation, and unauthorised access attempts. This architectural shift aligns closely with the same “never trust, always verify” principle that underpins CDR.
This approach is already widely used in environments where the tolerance for compromise is effectively zero – including critical national infrastructure (CNI) and operational technology (OT) environments. Its value lies in addressing the inherent limitation of detection-based security tools. When malware is continuously evolving, and zero-day vulnerabilities are increasingly exploited, the objective shifts from predicting specific threats to removing their ability to execute altogether.
In parallel, ZTNA enhances productivity by providing seamless, secure access to on-premise applications, SaaS platforms, document repositories, and case management systems, without the latency and friction often associated with legacy VPN solutions. Users experience direct-to-cloud connectivity, while security teams retain full visibility and control over data movement with DLP, CASB, and web/malware filtering all just part of the package.
From a governance perspective, this also supports broader regulatory obligations. Ensuring that only sanitised files enter the environment strengthens data protection controls under GDPR and reinforces compliance with the SRA standards and regulations. It demonstrates that the firm is taking proportionate technical measures to protect client information – an increasingly important consideration in the event of regulatory scrutiny.
Additionally, ZTNA contributes to compliance by enforcing least-privilege access and providing detailed audit trails of user activity. This visibility is particularly valuable in legal environments, where demonstrating control over who accessed what data, and when, is critical.
Of course, malicious files are but one entry point for potential attackers, and as we all know the best defence (short of stopping attacks before they start) is defence in depth. To that end Zero Trust principals become even more powerful when combining file sanitisation (OPSWAT) with secure access controls (iboss), creating a layered architecture that protects both content and connectivity.
BlueFort Security, OPSWAT and iboss
At BlueFort Security, we partner with OPSWAT to help UK law firms implement Deep CDR capabilities as part of a layered defence strategy. This enables robust file security that integrates seamlessly into existing workflows, without adding operational friction. Trusted by over 1,700 organisations globally, OPSWAT protects critical data, assets, and networks from file-borne threats with its Deep CDR technology achieving a 100% accuracy rating from SE Labs.
Alongside this, our partnership with iboss delivers modern Zero Trust Network Access (ZTNA) and Secure Access Service Edge (SASE) capabilities. This allows firms to securely connect users to applications, enforce consistent policies across all locations, and reduce reliance on legacy perimeter-based security.
Together, these technologies secure both the files entering the organisation and the pathways through which users access them. CDR significantly reduces the risk of malware entering the environment, while supporting data protection and regulatory compliance. Combined with Zero Trust access, even sophisticated threats are contained limiting their ability to spread, access sensitive systems, or exfiltrate data.
In a sector built on trust, confidentiality and efficiency, this balance is essential.
As law firms continue to adopt digital and AI-driven workflows, ensuring documents are safe by design and access to them is continuously verified must be foundational. Without both, gaps remain. With them, firms establish the backbone of a modern, resilient legal IT architecture.
If this resonates with you, BlueFort Security are here to help. Contact our team today to see how our tailored cybersecurity services can help protect your firm, reduce risk, and support a more secure digital future.
