Hackers Stole Social Security Numbers From CBIZ Again

computer screen with the word "security" and a mouse pointer

CBIZ has filed a data breach notification with the attorney general of Maine and you know what that means. Wait, maybe you don’t know what that means. Maine has a law that requires “information brokers” — such as an accounting firm that would be in possession of personal identifying information (PII) gathered from clients to perform services for them — to inform residents of Maine when they discover a data breach that has or is reasonably believed to have been acquired by an unauthorized person. They also have to file with the attorney general and do so “as expediently as possible and without reasonable delay.” In other words, if they get hacked they have to let victims and the state know (all 50 states require information brokers to inform customers of a breach, not all require a filing with the state). And that’s what happened to CBIZ.

CBIZ is the biggest firm to be data breached in recent months that we’re aware of since PwC and EY found themselves tangled in the MOVEit cybersecurity breach and ransom last year. CBIZ was also hit by the MOVEit vulnerability and informed 35,843 people their Social Security numbers were probably jacked by bad actors last year.

CBIZ Benefits & Insurance Services, Inc. provides actuarial, administration and investment advisory solution services for organizations, as well as providing recordkeeping and administration for retiree health and welfare plans.

According to the notification, it was retiree health and welfare plans that were accessed and the data included names and Social Security numbers.

Says the notification:

On June 24, 2024, CBIZ learned that an unauthorized party may have acquired information from certain databases. CBIZ promptly launched an investigation with the assistance of cybersecurity professionals. CBIZ’s investigation determined that an unauthorized party was able to exploit a vulnerability associated with one of its web pages, and acquired information from certain databases between June 2, 2024 and June 21, 2024. CBIZ conducted a review of the data acquired and determined that individuals associated with multiple CBIZ clients were impacted by the incident.

The retiree plan clients are:

  • Central Pennsylvania Teamsters
  • Knoll, Inc.
  • Liberty Utilities
  • Sanofi
  • Sanofi Pasteur

Seven Maine residents were affected by this breach. No information was given on how many victims there may be in other states in the AG filing referred to here. CBIZ began notifying victims on August 28, 2024.