TLDR
Upbit halted Solana (SOL) deposits and withdrawals after a security incident involving its Solana hot wallet, as confirmed by Upbit.
- The pause covered all Solana network deposits and withdrawals to protect users during the review period.
- The trigger was unauthorized outflows of about $3638 million in Solana-based assets reported.
- Upbit said it would cover losses and moved assets to cold storage during the investigation update.
Deep Dive
1. Who and Scope
The exchange is Upbit, South Koreas largest crypto platform. It froze Solana network deposits and withdrawals while it conducted emergency inspections and incident response, prioritizing user fund safety per the report.
This step is standard containment when hot wallets show anomalies, limiting further exposure while teams assess and remediate.
If you held SOL or Solana ecosystem tokens on Upbit, transfers were temporarily paused while systems were checked.
2. Why It Happened
Upbit detected abnormal activity in a Solana hot wallet and confirmed unauthorized outflows affecting multiple SOL ecosystem tokens, with losses estimated at roughly $3638 million, prompting an immediate suspension notice. Coverage detailed that deposits and withdrawals for Solana-based assets were stopped during security checks and tracing efforts analysis.
The incident appears exchange-specific (hot wallet compromise) rather than a protocol issue with Solana itself, based on the scope described in the reports above.
The driver was an exchange wallet security event. It does not imply Solanas network failed, but exchange-side controls were under review.
3. User Impact And Next Steps
Upbit said users would not bear losses, committing to cover the shortfall and moving assets to cold storage while freezing some affected tokens on-chain during the response update. Services were to resume after comprehensive security verification, with updates posted through official channels summary.
If you rely on exchange transfers for time-sensitive moves, plan for potential delays until the exchange announces full restoration.
Monitor Upbits customer center or announcements for the all-clear. On-exchange users are protected per the statements, but transfers can be temporarily unavailable during audits.
Conclusion
It was Upbit that halted Solana withdrawals, doing so after detecting unauthorized outflows from a Solana hot wallet. The pause is a containment measure, and the exchange stated it would absorb losses while finalizing security checks, which keeps user balances whole but temporarily limits transfer flexibility.
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