Real estate giant Cushman & Wakefield has confirmed a data breach after two cybercrime groups, ShinyHunters and Qilin, separately claimed responsibility for attacks on the company. A spokesperson told The Register the attack was "limited" in scope and stemmed from vishing (voice phishing), suggesting an employee was socially engineered. The representative said: "Cushman & Wakefield recently became aware of a limited data security incident due to vishing. We have activated our response protocols, including taking steps to contain the unauthorized activity and engaging third-party expert advisors to support a comprehensive response.  "Our systems and operations continue to run normally, and we are working diligently to investigate the incident.…