Belvedere probes cyberattack as report warns of rising risks

Belvedere is investigating a May cybersecurity incident that prompted the city to temporarily shut down its servers and network systems as officials work to determine whether any sensitive data was compromised.

The May 28 breach occurred just one month before the Marin County civil grand jury released a June 27 report documenting two major cyberattacks since 2024 that cost local agencies nearly $1 million and exposed vulnerabilities across the county’s independent networks.

City Manager Robert Zadnik said officials have identified the type of cyberattack but declined to share additional details, citing security risks. The city is working with the California Intergovernmental Risk Authority to investigate the incident, including whether any resident data or financial information was compromised.

“It was an annoying inconvenience,” Zadnik said. “But also an opportunity to see where some vulnerabilities may lie and make improvements.”

He said the investigation is expected to wrap up in a couple of months and that he hopes to update the City Council later this summer or in early fall.

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