Polygon's chief information security officer Mudit Gupta told CoinDesk that day that "no funds [were] lost as far as we know but we are still investigating", and that dApps using the Ankr RPC endpoint were non-functional. Ankr later announced that the RPC systems had been fully restored, and that the breach had come from a "third-party vendor" that enabled attackers to change Ankr's domain hosts.
Ankr gateways for Polygon and Fantom compromised, seed phrases possibly stolen
The Ankr public RPC gateways (basically an API for dApps and other services to communicate with the blockchain) for Polygon and Fantom were impacted when attackers compromised the projects' DNS management. Those who accessed Polygon or Fantom using Ankr's RPC gateways saw pop-up windows stating that "funds are at risk", and prompting them to enter their seed phrases at a website linked from the popup to "restore their wallet".