Dentons
670K client records stolen in ransomware attack
Law Firm Data Breaches (95 indexed)
Dentons (Global)
2.8M records from 79 offices — largest law firm in world breached via supply chain attack
Ashurst LLP
180K client records stolen in targeted attack
Stikeman Elliott
210K client records stolen
Herbert Smith Freehills
210K litigation records compromised
White & Case LLP
190K records from international arbitration cases exposed via compromised cloud storage
Goodmans LLP (Canada)
150K client records exposed in phishing
DLA Piper (Global)
2.1M client records exposed via third-party eDiscovery platform breach — regulatory filings
Simpson Thacher & Bartlett
450K leveraged buyout records exposed — private equity deal data and bank commitments
McCarthy Tetrault
340K client records exposed in targeted attack
Hogan Lovells
280K client records exposed in phishing attack
Weil Gotshal & Manges LLP
420K bankruptcy case records exposed — creditor claims and restructuring plans compromised
Bennett Jones (Canada)
190K client records compromised
Mayer Brown LLP
320K client records from structured finance deals exposed via phishing attack on partners
DLA Piper (2024)
560K client records exposed in network intrusion
Clifford Chance
340K client records compromised in network breach
Latham & Watkins LLP
820K client records exposed via compromised document management system — litigation files
Torys LLP (Toronto)
180K client records compromised
Kirkland & Ellis
340K client records compromised in targeted phishing
Orrick, Herrington & Sutcliffe
637K individuals affected — healthcare and financial client data stolen in 2023 attack
Cravath Swaine & Moore LLP
SEC insider trading investigation — Chinese hackers targeted deal data in M&A cases
Allen & Overy LLP (UK)
LockBit ransomware encrypted partner systems — M&A deal data and client confidences exposed
Norton Rose Fulbright
340K client records exposed — immigration case files and patent applications compromised
Cadwalader Wickersham & Taft
Data breach affecting client confidential records