hw_6ae1d2fcae61a4c3

Hacker attack on Swedish electricity grid operator.

Swedish power grid operator Svenska Kraftnät experienced a data breach on October 25, 2025, when ransomware group Everest accessed an external file-transfer system and claimed to have stolen roughly 280 GB of data. Electricity transmission operations were not affected.

Occurrence: Oct 25, 2025
Publication: Oct 25, 2025
First observed: Sep 24, 2026, 6:09 AM UTC
Review status: Not assessed
Countries: Sweden
Updated: Sep 27, 2026, 11:56 PM UTC

Attribution

Official

Facts

No facts

Sources

Hacker attack on Swedish electricity grid operator.

Role
Discovery lead

Publication
Oct 25, 2025, 12:16 PM UTC

Swedish power grid operator Svenska Kraftnät experienced a data breach on October 25, 2025, when ransomware group Everest accessed an external file-transfer system and claimed to have stolen roughly 280 GB of data. Electricity transmission operations were not affected.