The Cybersecurity and Infrastructure Security Agency (CISA) has issued an urgent warning regarding a newly added entry in its Known Exploited Vulnerabilities (KEV) catalog, a critical flaw impacting SmarterTools SmarterMail that is currently being exploited in ransomware attacks. Tracked as CVE-2026-24423, this high-severity vulnerability poses a substantial risk to mail server infrastructure worldwide. CISA confirmed […] The post CISA Warns of Actively Exploited SmarterTools SmarterMail Vulnerability Used in Ransomware Attacks appeared first on Cyber Security News.