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Overload attack (DDoS): Municipality and public administration, Switzerland 2024

On voting Sunday, 24 November 2024, a DDoS attack on the eastern Swiss website provider Backslash paralysed numerous municipal websites, including Aarau, Baden and Brugg; Backslash serves 68 municipalities in Aargau.

  • Incident · 11.2024 · Canton of Aargau, Switzerland
  • Evidence: confirmed by an authority
  • Overload attack (DDoS)
  • Attack via a supplier

As of

On this page
  1. What happened
  2. Who would have paid?
  3. Lessons
  4. Sources
  5. Similar cases

What happened

Only around 15:00 was the attack fully repelled. The transmission of the voting results ran via a separate system and was not disrupted.

Affected
Aargau municipalities (customers of the website provider Backslash)
Loss
no reliable figure
Business interruption
unknown
Ransom demanded / paid
unknown / unknown
Data affected
unknown
Bankruptcy
no
Entry point
DDoS on the website provider’s data centre

What would cyber insurance have paid?

That depends on the terms. Whether those affected were insured: unknown.

  • Outage at the IT provider

    Loss of income if the cloud or a provider is attacked

    Mostly limited 6 of 9 business products cover it fully, as an add-on or with limits.

Overview based on public policy terms, as of 06.11.2026. Only your policy and its general terms and conditions (GTC) are binding. No confirmation of cover.

What we can learn

Critical processes such as voting results belong on a system that does not depend on the web host.

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Sources

Similar cases