Attackers Exploited Citrix NetScaler Zero-Day for at Least Three Weeks Undetected

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

Mandiant researchers said dozens of organizations have been impacted by attacks attributed to advanced and suspected state-sponsored threat groups. They expect more attacks to come.

Citrix NetScaler exploitation began days before public notification

Customers need to check systems for compromise prior to patching, because the security upgrade may not fully resolve an infected system.

WHIPSHOT and SLAPSHOT: the tools behind an active Citrix NetScaler campaign

Mandiant and GTIG detail active exploitation of a Citrix NetScaler zero-day, deploying custom web shells WHIPSHOT and SLAPSHOT for root access. Mandiant… Read more →

Hackers exploit Citrix NetScaler zero-day to deploy web shells | #hacking | #cybersecurity | #infosec | #comptia | #pentest | #hacker - National Cyber Security Consulting

Cybersecurity firms say attackers exploited the Citrix NetScaler CVE-2026-88772 zero-day to deploy custom web shells and tunneling malware, gain root access, steal credentials, and spread into internal networks. Mandiant says the attacks began in at least early September and are believed to have impacted organizations in North America and Europe across the government, financial services, […] Thank you for subscribing to our RSS feed!