ESA confirms data breach, but said it's not certain that any classified data was stolen

Spaceintelreport • December 30, 2025

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LA PLATA, Maryland — The European Space Agency (ESA) said it had begun an "internal forensic security analysis and short-term remediation ...

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This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

ESA Confirms Data Breach with Potential Data Leak The European Space Agency (ESA) has confirmed a data breach, with a threat actor claiming to have leaked approximately 200 gigabytes of data. An internal investigation is ongoing to determine the extent of the breach and whether classified data was compromised. 3 sources 44

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European Space Agency