Malicious actors recently exploited a Citrix vulnerability to steal active directory data from a critical infrastructure organization, the Cybersecurity and Infrastructure Security Agency reported recently, urging organizations to take certain steps to detect a potential system compromise and apply patches.

“This serious vulnerability in the very commonly used Citrix/Netscaler Application Delivery Controller was unknown prior to exploitation,” said John Riggi, AHA’s national advisor for cybersecurity and risk. “According to security researchers, the vulnerability may be associated with a Chinese government espionage campaign targeting critical infrastructure and allows hackers to access key network resources, such as active directory, and remotely execute malicious code. It is recommended that organizations using this service upgrade to the latest version of Netscaler ADC and Netscaler Gateway and patch according to bulletin CVE-2023-3467. The implementation of phishing-resistant multi-factor authentication also is highly recommended as a baseline security practice to help mitigate the risk of this and all other cyberattacks.”

For more information on this or other cyber and risk issues, contact Riggi at jriggi@aha.org. For the latest cyber and risk resources and threat intelligence, visit aha.org/cybersecurity

Related News Articles

Headline
In part one of a new blog, John Riggi, AHA national advisor for cybersecurity and risk, and Scott Gee, AHA deputy national advisor for cybersecurity and risk,…
Perspective
Public
This week, the FBI issued an urgent warning to all users — including hospitals — of a critical security soft spot within Oracle’s E-Business Suite, stating “…
Headline
The Health Sector Coordinating Council Oct. 7 released its Sector Mapping and Risk Toolkit, created to help health care providers and other organizations…
AHA Cyber Intel
As of Oct. 3, 2025, 364 hacking incidents had been reported to the U.S. Department of Health and Human Services Office for Civil Rights, affecting over 33…
Headline
The AHA Oct. 6 released a Cybersecurity Advisory urging immediate action against a critical Oracle E-Business Suite vulnerability that is remotely exploitable…
Headline
The AHA has launched an enhanced Cybersecurity and Risk webpage designed to help health care organizations strengthen their defenses against emerging cyber and…