Zimbra
Russian hackers exploit Zimbra flaw in Ukrainian govt attacks
Hackers part of APT28, a state-backed threat group linked to Russia’s military intelligence service (GRU), are exploiting a Zimbra Collaboration Suite (ZCS) vulnerability in attacks targeting Ukrainian government entities. This high-severity security flaw (tracked as CVE-2025-66376 and patched in early November) stems from a stored cross-site scripting (XSS) that unauthenticated attackers can exploit to gain remote code execution (RCE) […]
CISA orders feds to patch Zimbra XSS flaw exploited in attacks
CISA has ordered U.S. government agencies to secure their servers against an actively exploited vulnerability in the Zimbra Collaboration Suite (ZCS). Zimbra is a very popular email and collaboration software suite used by hundreds of millions of people worldwide, including thousands of businesses and hundreds of government agencies. Tracked as CVE-2025-66376 and patched in early November, this high-severity security […]
Critical Zimbra RCE flaw exploited to backdoor servers using emails
Hackers are actively exploiting a recently disclosed RCE vulnerability in Zimbra email servers that can be triggered simply by sending specially crafted emails to the SMTP server. The Zimbra remote code execution flaw is tracked as CVE-2024-45519 and exists in Zimbra’s postjournal service, which is used to parse incoming emails over SMTP. Attackers can exploit the […]