# Zilliqa Hits Emergency Brakes as Private Keys Exposed Security flaw in Ledger wallet app halts ZIL transactions, triggering exchange warnings. - **Source:** [DailyCoin](https://brifing.si/source/3e9b0f85-cb2f-40ee-ba61-db9410cf0937) - **Published:** 2026-07-23 - **Topic:** [Finance](https://brifing.si/c/finance) - **Original article:** - **On Brifing:** https://brifing.si/s/b14f055f-b166-491d-a5a3-3cae16e340f3 ## Emergency Freeze Zilliqa suspended native ZIL transfers due to a critical vulnerability in its Ledger hardware wallet app. The flaw could expose users' private keys through a transaction signing error. This rare wallet-side failure prompted South Korea's largest crypto exchange Upbit to take action. ## Exchange Alert Upbit placed ZIL under cautionary status and initiated a delisting review. While trading continues, this move signals heightened security scrutiny. ZIL prices dropped approximately 10% following the news as traders reacted to the security concerns. ## Technical Breakdown The vulnerability stems from flawed randomness generation in transaction signatures within the Ledger app. After about 5 native transactions, attackers could potentially derive private keys using standard computing power. Zilliqa warned all affected accounts should be considered compromised. ## Unaffected Areas EVM-compatible transactions and software wallets remain unaffected for now. Zilliqa and partners like KuCoin are tracking stolen funds. The bug was publicly disclosed around July 21, 2026. ## Industry-wide Implications This incident highlights how even 'secure' hardware wallets can be compromised by application-level errors. Markets react swiftly when user funds are at risk. Affected users are advised to immediately rotate their keys and treat this as a liquidity event. ## Security Wake-up Call While Zilliqa enters damage-control mode, the trust impact may linger. This episode demonstrates how quickly technical flaws can escalate into exchange scrutiny and price volatility. It serves as a critical reminder for all crypto hardware wallet users about security vulnerabilities. ## Sources covering this story - https://dailycoin.com/zilliqa-freezes-everything-after-bug-exposes-private-keys/ — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._