Security News > 2024 > January > Citrix warns of new Netscaler zero-days exploited in attacks
Citrix urged customers on Tuesday to immediately patch Netscaler ADC and Gateway appliances exposed online against two actively exploited zero-day vulnerabilities.
The two zero-days impact the Netscaler management interface and expose unpatched Netscaler instances to remote code execution and denial-of-service attacks, respectively.
In a security advisory published today, Citrix urged all admins to immediately patch their Netscaler appliances against the two zero-days to block potential attacks.
"Cloud Software Group strongly urges affected customers of NetScaler ADC and NetScaler Gateway to install the relevant updated versions as soon as possible."
Another critical Netscaler flaw patched in October and tracked as CVE-2023-4966 was also exploited as a zero-day since August by various threat groups to hack into the networks of government organizations and high-profile tech companies worldwide, such as Boeing.
HHS' security team, the Health Sector Cybersecurity Coordination Center, also issued a sector-wide alert urging health organizations to secure their NetScaler ADC and NetScaler Gateway instances against surging ransomware attacks.
News URL
Related news
- Apple fixes zero-day exploited in 'extremely sophisticated' attacks (source)
- Apple fixes zero-day flaw exploited in “extremely sophisticated” attack (CVE-2025-24200) (source)
- PostgreSQL Vulnerability Exploited Alongside BeyondTrust Zero-Day in Targeted Attacks (source)
- Critical PostgreSQL bug tied to zero-day attack on US Treasury (source)
- Citrix Releases Security Fix for NetScaler Console Privilege Escalation Vulnerability (source)
- Microsoft fixes Power Pages zero-day bug exploited in attacks (source)
- Broadcom fixes three VMware zero-days exploited in attacks (source)
- Apple fixes WebKit zero-day exploited in ‘extremely sophisticated’ attacks (source)
- Apple Releases Patch for WebKit Zero-Day Vulnerability Exploited in Targeted Attacks (source)
- EncryptHub linked to MMC zero-day attacks on Windows systems (source)
Related Vulnerability
| DATE | CVE | VULNERABILITY TITLE | RISK |
|---|---|---|---|
| 2023-10-10 | CVE-2023-4966 | Unspecified vulnerability in Citrix products Sensitive information disclosure in NetScaler ADC and NetScaler Gateway when configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA ?virtual?server. | 7.5 |