London Daily

Focus on the big picture.
Thursday, Jan 22, 2026

A data breach is exposing Big Law firms who were using a 20-year-old system for handling sensitive documents. Here's what we know so far.

A data breach is exposing Big Law firms who were using a 20-year-old system for handling sensitive documents. Here's what we know so far.

Accellion, a top legal data vendor, was hit by a data breach. Here are firms that could be at risk in the legal industry's latest data security risk.
Leading law firm data vendor Accellion fell victim to a data breach now tied to hacks at least two big customers, the latest in a string of data-security failures that has affected the legal industry in recent years.

Accellion said this month that its aging File Transfer Appliance (FTA) product was compromised. For years, Accellion, which provides file transfer services, has been a top choice among Big Law to share sensitive files that are too big to be emailed, and is used by 35% of the largest law firms.

Accellion FTA is meant to help large companies like law firms securely transfer large and sensitive files through a private cloud system. The 20-year-old platform is being phased out, Accellion said this month, and will not allow renewals after April 30.

The Wall Street Journal on Tuesday reported that Jones Day, which has represented major corporate clients like Alphabet and Goldman Sachs, along with Donald Trump's presidential campaign, was among the firms impacted. The anonymous hacker who posted documents purported to be from Jones Day on the dark web told the Journal that it had accessed Jones Day servers and didn't obtain the information through Accellion, something Jones Day disputed.

"Jones Day's network has not been breached," the firm said in a statement, adding that the incident was still under investigation. "Jones Day has been informed that Accellion's FTA file transfer platform, which is a platform that Jones Day — like many law firms, companies and organization — used was recently compromised and information taken."

Goodwin Procter, another large firm that has used Accellion, experienced a data breach on Jan. 20, Bloomberg Law first reported. When reached by Insider on Wednesday, the firm declined to comment.

In addition to using Accellion, Goodwin Procter also represented an investor in the company in a $120 million financing round last year.

Many law firms have been mentioned in the Accellion's marketing material over the years, but several — including Cozen O'Connor, Seyfarth Shaw, Arent Fox, and Barnes & Thornburg — weren't impacted by the breach, according to statements by the firms or people familiar with the matter.

Rob Dougherty, an Accellion spokesman, told Insider that "the vast majority" of its law-firm clients no longer use FTA and have upgraded to its newer Kiteworks product, but didn't respond to a request for specific numbers.

Kiteworks was launched in 2014. FTA, meanwhile, is nearing the end of its product life, Accellion said in its Feb. 1 statement disclosing what it called a "sophisticated cyberattack."

Accellion has also touted Fragomen Del Rey Bernsen & Lowey; Cahill Gordon & Reindell; Willkie Farr & Gallagher; Squire Patton Boggs; Ropes & Gray; Dentons; Latham & Watkins; Foley & Lardner; and Cadwalader Wickersham & Taft as clients.

Representatives for Cahill, Squire, Ropes, Latham and Cadwalader said they weren't impacted by the breach. A Dentons representative said the firm does not use the DTA system. People at the other firms didn't respond to comment requests.

Law firms and the companies that manage their data have been targeted in privacy attacks in recent years: DLA Piper was hit in a major cybersecurity attack in 2017, in which hackers demanded a mere $300 in bitcoin for the firm to regain access to its computer systems. A 2019 Law.com report estimated that more than 100 Big Law firms have reported data breaches.

Frank Gillman, a law firm information technology consultant with Vertex Advisors, told Insider that he couldn't speak about Accellion specifically, but said software vendors are generally not looking to break the bank when they ask a firm to upgrade.

"Typically, software companies looking to get clients from an older iteration to a newer product line keep the overall price increase to a 10% to 15% range increase, with large incentives for longer subscription periods," he said in an email. "Otherwise, it's difficult to meet budgetary restrictions of the customer."

The responses from law firms and their third-party data storage partners to data breaches have varied. In some cases, hackers have threatened to erase or release files unless they are paid. In a late 2020 breach notification, Cadwalader reportedly told a regulator that one of its vendors was impacted by a ransomware attack and paid to have its systems unencrypted.

The Wall Street Journal reported that the hacker who claimed to have breached Jones Day said the firm hadn't responded to its outreach.
Newsletter

Related Articles

0:00
0:00
Close
Elizabeth Hurley Tells UK Court of ‘Brutal’ Invasion of Privacy in Phone Hacking Case
UK Bond Yields Climb as Report Fuels Speculation Over Andy Burnham’s Return to Parliament
Trump’s Board of Peace: Breakthrough Diplomacy or a Hostile Takeover of Global Order?
Trump’s Board of Peace: Breakthrough Diplomacy or a Hostile Takeover of Global Order?
The Greenland Gambit: Economic Genius or Political Farce?
The Greenland Gambit: Economic Genius or Political Farce?
The Greenland Gambit: Economic Genius or Political Farce?
Will AI Finally Make Blue-Collar Workers Rich—or Is This Just Elite Tech Spin?
Prince William to Make Official Visit to Saudi Arabia in February
Prince Harry Breaks Down in London Court, Says UK Tabloids Have Made Meghan Markle’s Life ‘Absolute Misery’
Malin + Goetz UK Business Enters Administration, All Stores Close
EU and UK Reject Trump’s Greenland-Linked Tariff Threats and Pledge Unified Response
UK Deepfake Crackdown Puts Intense Pressure on Musk’s Grok AI After Surge in Non-Consensual Explicit Images
Prince Harry Becomes Emotional in London Court, Invokes Memory of Princess Diana in Testimony Against UK Tabloids
UK Inflation Rises Unexpectedly but Interest Rate Cuts Still Seen as Likely
AI vs Work: The Battle Over Who Controls the Future of Labor
Buying an Ally’s Territory: Strategic Genius or Geopolitical Breakdown?
AI Everywhere: Power, Money, War, and the Race to Control the Future
Trump vs the World Order: Disruption Genius or Global Arsonist?
Trump vs the World Order: Disruption Genius or Global Arsonist?
Trump vs the World Order: Disruption Genius or Global Arsonist?
Trump vs the World Order: Disruption Genius or Global Arsonist?
Arctic Power Grab: Security Chessboard or Climate Crime Scene?
Starmer Steps Back from Trump’s ‘Board of Peace’ Amid Strained US–UK Relations
Prince Harry’s Lawyer Tells UK Court Daily Mail Was Complicit in Unlawful Privacy Invasions
UK Government Approves China’s ‘Mega Embassy’ in London Amid Debate Over Security and Diplomacy
Trump Cites UK’s Chagos Islands Sovereignty Shift as Justification for Pursuing Greenland Acquisition
UK Government Weighs Australia-Style Social Media Ban for Under-Sixteens Amid Rising Concern Over Online Harm
Trump Aides Say U.S. Has Discussed Offering Asylum to British Jews Amid Growing Antisemitism Concerns
UK Seeks Diplomatic De-escalation with Trump Over Greenland Tariff Threat
Prince Harry Returns to London as High Court Trial Begins Over Alleged Illegal Tabloid Snooping
High-Speed Train Collision in Southern Spain Kills at Least Twenty-One and Injures Scores
Meghan Markle May Return to the U.K. This Summer as Security Review Advances
Trump’s Greenland Tariff Threat Sparks EU Response and Risks Deep Transatlantic Rift
Prince Harry’s High Court Battle With Daily Mail Publisher Begins in London
Trump’s Tariff Escalation Presents Complex Challenges for the UK Economy
UK Prime Minister Starmer Rebukes Trump’s Greenland Tariff Strategy as Transatlantic Tensions Rise
Prince Harry’s Last Press Case in UK Court Signals Potential Turning Point in Media and Royal Relations
OpenAI to Begin Advertising in ChatGPT in Strategic Shift to New Revenue Model
GDP Growth Remains the Most Telling Barometer of Britain’s Economic Health
Prince William and Kate Middleton Stay Away as Prince Harry Visits London Amid Lingering Rift
Britain Braces for Colder Weather and Snow Risk as Temperatures Set to Plunge
Mass Protests Erupt as UK Nears Decision on China’s ‘Mega Embassy’ in London
Prince Harry to Return to UK to Testify in High-Profile Media Trial Against Associated Newspapers
Keir Starmer Rejects Trump’s Greenland Tariff Threat as ‘Completely Wrong’
Trump to hit Europe with 10% tariffs until Greenland deal is agreed
Prince Harry Returns to UK High Court as Final Privacy Trial Against Daily Mail Publisher Begins
Britain Confronts a Billion-Pound Wind Energy Paradox Amid Grid Constraints
The graduate 'jobpocalypse': Entry-level jobs are not shrinking. They are disappearing.
Cybercrime, Inc.: When Crime Becomes an Economy. How the World Accidentally Built a Twenty-Trillion-Dollar Criminal Economy
×