As tax filing approaches, hackers target US taxpayers

Cybernews • December 29, 2025

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Lynx ransomware has claimed a breach of CSA Tax & Advisory, exposing SSNs, tax returns, and client data.

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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.

Lynx Ransomware Breach Exposes Taxpayer Data The Lynx gang, linked to Russia, has claimed responsibility for a ransomware attack on CSA Tax & Advisory, resulting in the exposure of sensitive taxpayer information, including Social Security Numbers (SSNs) and tax returns. This breach affects numerous clients as tax filing season approaches. 2 sources 43

Extracted Entities

Attack Types (1)

Companies (1)

CSA Tax & Advisory

Ransomware Groups (1)