ReportedReported by fewer than three independent publishers, with no official finding.
Nikkei Says 17,000 Impacted by Data Breach Stemming From Slack Account Hack
Japanese media giant Nikkei on Tuesday reported that hackers had gained access to employee Slack accounts, stealing information pertaining to thousands of individuals. Nikkei, which is best known for major financial...
DII-2025-003792 sources ↓
What happened
Not publicly disclosed.
Classification
Sources and evidence
This record was researched and written by the Index, based on the following original reporting.
DataBreaches.net
Nikkei Says 17,000 Impacted by Data Breach Stemming From Slack Account Hack
5 November 2025