Attackers exploited Citrix NetScaler zero-day for at least three weeks undetected

CyberScoop RSS content reports active exploitation of Citrix NetScaler zero-days affecting dozens of organizations, expanded Russian Star Blizzard cyberespionage and phishing activity, a newly patched critical Kiteworks vulnerability, ShinyHunters-related breaches and arrests, and other cybersecurity policy and threat developments. The most urgent issue is the actively exploited Citrix NetScaler vulnerability, for which vendor patches were released after unofficial warnings and weeks of undetected exploitation.