Opera Software has a certificate stolen and malware signed to it
On June 19, unidentified people hacked Opera Software’s servers and entered the company's internal network. Personal data was not compromised, but at least one Opera Software certificate was stolen. The expired certificate was signed by malicious code, which they stuck in the auto update, so if someone updated the browser between 01:00 and 01:36 UTC on June 19, check your computer for viruses!