South Korean crypto exchange Upbit has flagged Zilliqa (ZIL) as a cautionary asset following the discovery of a critical vulnerability in its Ledger application. This nonce-generation flaw allows private keys to be recovered from public signatures after approximately five native transactions. All versions released between 2019 and 2026 are affected, with active exploitation observed on July 19. Native Zilliqa transactions have been suspended, deposits and withdrawals blocked on Upbit, and the exchange threatens to delist the token if the security issue remains unresolved.
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