Thomson Reuters hit by cyberattack that saw court documents across 11 states accessed by a hacker

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• Thomson Reuters confirmed March 2026 breach of its C‑Track court management system

• Incident affected courts in 11 US states, Ontario, and the US Virgin Islands

• No operational disruption; scope of exposed records still under investigation, no misuse reported yet

Thomson Reuters, the IT company behind the Reuters news agency, suffered a cyberattack a few months ago, exposing certain court documents to the attackers. In a brief announcement published earlier this week, it seems Thomson Reuters only noticed the intrusion now, months after it was already over.

Here is what happened: Thomson Reuters operates a court case-management system called C-Track. It is a tool used by different courts to manage things like cases, filings, hearings, and schedules. It is used by courts in several US states, the US Virgin Islands, as well as Ontario, Canada.

On June 30, 2026, Thomson Reuters detected unauthorized activity in one of its cloud environments, prompting an investigation which later determined that an unauthorized threat actor broke in and obtained some C-Track files. This happened in March 2026.

Investigation underway

So far, the incident is confirmed to have taken place across 11 US states (Alabama, Pennsylvania, Kentucky, Montana, Nevada, North Dakota, South Carolina, Tennessee, Ohio, New Hampshire, Wyoming), the U.S. Virgin Islands, and Ontario, Canada, exposing court records and personal information. Ontario's three Chief Justices confirmed it, as well, saying Thomson Reuters notified Ontario's Ministry of the Attorney General on July 23.

A more detailed investigation is currently underway, and all relevant authorities have been notified, it was said. At press time, Thomson Reuters did not yet determine exactly what information was accessed, or how many people were affected. The good news, however, is that there is currently no evidence of identity theft resulting from the incident, and there is no indication that systems handling court-related financial transactions were affected.

C-Track itself remains operational, as well. No threat actors have yet claimed responsibility for the attack or threatened to leak the files to the dark web.

"There has been no operational disruption to C-Track as a result of this incident," a Thomson Reuters spokesperson said. "Our products and services remain fully operational and are safe ​to continue to use. Independent ​cybersecurity experts assisted in ⁠the investigation and validated the remediation measures implemented."