On June 8, the modular L1 blockchain Syscoin released a preliminary post-incident report regarding a security event. Attackers exploited a validation vulnerability in the cross-chain relay path to illegally mint approximately 5 billion SYS on the UTXO side. Following the incident, Syscoin's cross-chain operations have been suspended. The illegally minted funds have been transferred and divided, currently concentrated in two main addresses. The team has contacted multiple exchanges and ecosystem partners to request the freezing or monitoring of funds related to the contaminated UTXO. Additionally, the team has identified the affected validation path and developed a remediation plan, which is currently being prioritized for implementation along with the correction of the illegal SYS output. The official reminder to users is to refrain from any interactions during the cross-chain suspension period, and they will continue to provide updates on the situation.