ESET researchers have revealed that the Winter Vivern Russian hacking group has exploited a zero-day vulnerability in Roundcube Webmail, targeting various European government entities and think tanks.

ESET Research has been closely tracking the cyberespionage operations of Winter Vivern for more than a year and, during our routine monitoring, we found that the group began exploiting a zero-day XSS ...

Low-profile threat group Winter Vivern has been exploiting a zero-day flaw in Roundcube Webmail servers with a malicious email campaign targeting governmental organizations and a think tank in Europe ...

According to ESET Research, Winter Vivern is a Russian hacking group that has been operating since 2020. The notorious cybercriminals reportedly target governments across Central Asia and Europe. The ...