Highmark Inc

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Highmark, Inc. disclosed a cybersecurity incident occurring between December 13-15, 2022, where an employee clicked a malicious phishing link, compromising their email account. The threat actor accessed emails containing Protected Health Information (PHI) and PII of Highmark members, including names, SSNs, member IDs, claims data, and financial account numbers. Highmark shut down the mailbox, reset passwords, and implemented network blocking. Affected individuals were offered 24 months of Experian IdentityWorks.

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