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Aon faces lawsuits over cyberattack


Two putative class action lawsuits have been filed against Aon PLC alleging the brokerage was hacked between December 2020 and February 2022 but failed to alert affected individuals for more than three months.

About 145,000 individuals were affected by the intrusion in Aon’s systems, which Aon detected on Feb. 25, 2022, court filings say.

Victims were not informed until about May 27, 2022, the suits allege. Information accessed included Social Security numbers, driver’s license numbers and benefits enrollment information.

In disclosures to the U.S. Securities and Exchange Commission on Feb. 28,  Aon said it was investigating a cyberattack on “a limited number” of its systems. “The incident has not had a significant impact on the company’s operations,” Aon said in the filing.

According to the lawsuits, the data breach notice sent to those affected said Aon reported the incident to law enforcement authorities, including the FBI. The notice said Aon had taken measures to prevent a similar occurrence in the future including enhancing the security of its network, systems and data, and it would evaluate additional steps that may be taken.

The lawsuits, both of which were filed in U.S. District Court in Chicago and assigned to separate judges, are Misty Williams et al. v. Aon PLC, which was filed June 29 and Sharon Rushing et al. v. Aon PLC, which was filed Friday.

Charges include negligence, unjust enrichment, breach of implied contract and invasion of privacy, among others.

Aon did not immediately respond to a request for comment on the litigation.