https://securityaffairs.com/153030/apt/winter-vivern-0day-roundcube.html
Winter Vivern APT exploited zero-day in Roundcube webmail software in recent attacks
Oct 26, 2023 - Russia-linked threat actor Winter Vivern has been observed exploiting a zero-day flaw in Roundcube webmail software
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https://www.proofpoint.com/us/blog/threat-insight/exploitation-dish-best-served-cold-winter-vivern-uses-known-zimbra-vulnerability
Winter Vivern Uses Zimbra Vulnerability to Target NATO Email | Proofpoint US
Discover how Winter Vivern uses Zimbra vulnerability to target NATO webmail portals in Europe. Read on for the key takeaways learned by Proofpoint researchers.
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