hēi / kè / fā / xiàn / xì / tǒng / de / ān / quán / lòu / dòng / ， / chéng / xì / ér / rù / bìng / qiè / qǔ / le / yòng / hù / zī / liào

黑客发现系统的安全漏洞，乘隙而入并窃取了用户资料。

The hackers found a security loophole, exploited it, and stole user information.