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Incident · State breach notice (California AG)

Sheppard Mullin Notifies California AG of Social Engineering Data Incident

Published 2026-10-13. By the cisonews.net Desk.

What the notice says

Sheppard, Mullin, Richter & Hampton LLP notified the California Attorney General on October 2, 2026, after a security incident affecting personal information handled in connection with legal services provided to the firm's clients. The notice states that Sheppard, Mullin, Richter & Hampton LLP says it . The firm states that , and that the event was confined to the one attorney involved. According to the notice, Sheppard, Mullin, Richter & Hampton LLP determined that the recipient's personal information was contained in one of the impacted files, stating . The firm is offering and states enrollment must occur .

What the notice leaves open

The notice does not specify the exact categories of personal information involved beyond stating an unspecified category was present in the impacted file. It also does not provide an overall total number of individuals affected, though it notes . The notice as filed does not describe how the social engineering event was carried out or what kind of documents were disclosed.

Sources

  1. 2026-10-02 · ASheppard, Mullin, Richter & Hampton LLP, notice filed with the California Attorney General, published October 2, 2026
  2. 2026-10-02 · ACalifornia Attorney General, data breach notification record, published October 2, 2026

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