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Deloitte cybersecurity incidents and threat signals
deloitte.com
This company page brings together public reporting currently associated with Deloitte. It reflects signals published by Shadow Tier and should not be read as a complete incident history.
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1
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July 1, 2026
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Based on all published signals currently linked to Deloitte. Affected countries come from victim data; the company country above remains a separate profile fact. Counts describe this reporting set, not overall incident prevalence.
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Ransomware Group Claims to Have Stolen Deloitte's Data, Uploaded December 11, 2024
A ransomware group claimed to have stolen data from Deloitte, with the claim being uploaded on December 11, 2024. This incident is related to the RI Bridges system breach where Deloitte was a vendor. The Brain Cipher ransomware gang also claimed to have stolen over 1TB of data in an attack on the UK branch of Deloitte.
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What does the Deloitte page include?
It combines a reviewed organization profile with all current published Shadow Tier signals explicitly linked to Deloitte.
Does every mention of Deloitte appear here?
No. A signal must contain a reliable company connection and meet the publication criteria; incidental or ambiguous mentions are excluded.
Why can the incident count change?
The page follows current published reporting. Counts change as new evidence is added, classifications are reviewed, or older signals leave the reporting window.