NATO email breach caused by Winter Vivern hackers exploiting Zimbra vulnerability

Since February 2023, a Russian hacking group called TA473, or ‘Winter Vivern’, has been using unpatched Zimbra endpoints to steal emails of NATO officials, governments, military personnel, and diplomats, according to a report by cybersecurity firm Proofpoint. The group targets unpatched webmail platforms using the Acunetix tool vulnerability scanner, sends phishing emails from compromised addresses […]