Latest cybersecurity reporting from selected sources.

Healthplex, Part of UnitedHealth Group, Lacked MFA on Compromised Email AccountNew York State has fined a dental plan administrator owned by UnitedHealth Group $2 million for failing to protect data with multifactor authentication and other issues related to a phishing breach that affected 90,000 people. It's the state's second fine against Healthplex for the same breach.

Also: Critical Infrastructure Security and Fortinet's Latest AcquisitionIn the latest weekly update, ISMG editors discussed critical infrastructure security challenges, a report on the 2022 Medibank breach compromising personal data for 10 million people, and Fortinet's acquisition to integrate Lacework's cloud-native security into its Security Fabric and SASE platform.

A British Library report found the most likely source of the incident was the compromise of third-party account credentials and no MFA was in place to stop the attackers

Customer Accounts Were Secured by MFA, But Contractor's Credentials Exposed DataAustralian telecom company Tangerine is blaming the compromise of a third-party contractor's credentials for exposing personal information of 232,000 customers, which had been stored in a legacy database. The breach exposed customers' names, birthdates, mobile numbers, addresses and account numbers.

Okta, a company that provides identity tools like multi-factor authentication and single sign-on to thousands of businesses, has suffered a security breach involving a compromise of its customer support unit, KrebsOnSecurity has learned. Okta says the incident affected a "very small number" of customers, however it appears the hackers responsible had access to Okta's support platform for at least two weeks before the company fully contained the intrusion.

Software company Retool says the accounts of 27 cloud customers were compromised following a targeted and multi-stage social engineering attack. [...]

Twilio, which earlier this month became a sophisticated phishing attack, disclosed last week that the threat actors also managed to gain access to the accounts of 93 individual users of its Authy two-factor authentication (2FA) service

The threat actor behind the attacks on Twilio and Cloudflare earlier this month has been linked to a broader phishing campaign aimed at 136 organizations that resulted in a cumulative compromise of 9,931 accounts