Over 10,000 Zimbra Collaboration Suite (ZCS) instances exposed online are vulnerable to ongoing attacks exploiting a cross-site scripting (XSS) security flaw. […]
Tag: Zimbra
AI, Cybersecurity, Europe, Exploits, Global Security News, Government & Policy, Russia
Russian APT targets Ukraine via Zimbra XSS flaw CVE-2025-66376
Russian APT exploits a critical XSS flaw in Zimbra, tracked as CVE-2025-66376, running scripts via HTML emails to target users in Ukraine. Russia-linked threat actor exploits a high-severity XSS vulnerability, tracked as CVE-2025-66376 (CVSS score of 7.2), in Zimbra Collaboration. Attackers exploited insufficiently sanitized HTML emails to run scripts when opened, targeting users in Ukraine.…
AI, Cybersecurity, Exploits, Global Security News, Network Security, Risk Management
U.S. CISA adds Microsoft SharePoint and Zimbra flaws to its Known Exploited Vulnerabilities catalog
U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds SharePoint and Zimbra flaws to its Known Exploited Vulnerabilities catalog. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added ([1, 2]) SharePoint and Zimbra flaws to its Known Exploited Vulnerabilities (KEV) catalog. Below are the flaws added to the catalog: CVE-2026-20963 (CVSS score of 8.8) – Microsoft SharePoint Deserialization…