Asos customers have reported receiving a rogue app notification claiming the online clothing retailer's Snowflake instance has been compromised and threatening to leak data. The notification included a link to a Telegram channel named "Xuanye Wen Gateway" and addressed Asos's data protection officer and IT team. "Dear ASOS DPO and IT, we have fully compromised the Snowflake instance. Engage with us, or we will leak it," it says. The notification does not, by itself, establish that the sender accessed Asos's Snowflake instance or sensitive customer data. How the message was sent remains unclear. Asos's share price fell by around 12 percent following reports of the notification, although it has recovered slightly since. Several hours after publication, an Asos spokesperson confirmed the…