
CISA Alerts on Active Exploitation of Zimbra Collaboration Suite Vulnerability
CISA added four actively exploited vulnerabilities to its KEV catalog, including flaws in Multi-Router Looking Glass, PHPMailer, Ruby on Rails, and Zimbra, with specific exploitation details and a critical Citrix NetScaler ADC flaw (CVE-2025-5777) under active attack, prompting urgent updates for federal agencies.