MEDIUM
Russian State-Supported Cyber Actors Conduct Phishing Campaign Targeting Users of Zimbra Collaboration Suite
- Source
- US-CERT Alerts
- Published
- 2026-07-21
<div class="c-page-title__buttons"><a class="c-button" href="https://media.defense.gov/2026/Jul/22/2003965244/-1/-1/1/CSA_RUSSIA_PHISHING_TARGET_ZIMBRA.PDF">Russian State-Supported Cyber Actors Conduct Phishing Campaign Targeting Users of Zimbra Collaboration Suite</a></div> <h2><strong>Executive summary</strong> </h2> <p>A group of Russian state-supported cyber actors has been targeting and compromising various Western government and commercial organizations using the Zimbra Collaboration Suite (ZCS) software since at least July 2025. The Russian state-supported advanced persistent threa