Kia suffered a days-long outage affecting mobile and web-based service, which some claim to be tied to a ransomware attack. (Kia Corporation)

A days-long outage affecting mobile and web-based service calls into question Kia Corporation's contingency planning for cybersecurity incidents, even as the company remains defiant about claims that a ransomware and data breach attack are to blame.

Members of the DopplePaymer ransomware gang have added both Kia and parent organization Hyundai Motor Company to their public leak site, and last week a ransomware note demanding a $20 million extortion payment was published in at least one prominent media report. This followed a string of reports and social media complaints detailing the disruption of key online and mobile services such as the Kia Owners Portal, UVO Mobile Apps and the Consumer Affairs Web portal.

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