Trustwave Unveils New Offerings to Maximize Value of Microsoft Security Investments. Learn More

Trustwave Unveils New Offerings to Maximize Value of Microsoft Security Investments. Learn More

Managed Detection & Response

Eliminate active threats with 24/7 threat detection, investigation, and response.

Co-Managed SOC (SIEM)

Maximize your SIEM investment, stop alert fatigue, and enhance your team with hybrid security operations support.

Advisory & Diagnostics

Advance your cybersecurity program and get expert guidance where you need it most.

Penetration Testing

Test your physical locations and IT infrastructure to shore up weaknesses before exploitation.

Database Security

Prevent unauthorized access and exceed compliance requirements.

Email Security

Stop email threats others miss and secure your organization against the #1 ransomware attack vector.

Digital Forensics & Incident Response

Prepare for the inevitable with 24/7 global breach response in-region and available on-site.

Firewall & Technology Management

Mitigate risk of a cyberattack with 24/7 incident and health monitoring and the latest threat intelligence.

Offensive Security
Solutions to maximize your security ROI
Microsoft Exchange Server Attacks
Stay protected against emerging threats
Rapidly Secure New Environments
Security for rapid response situations
Securing the Cloud
Safely navigate and stay protected
Securing the IoT Landscape
Test, monitor and secure network objects
Why Trustwave
About Us
Awards and Accolades
Trustwave SpiderLabs Team
Trustwave Fusion Security Operations Platform
Trustwave Security Colony
Technology Alliance Partners
Key alliances who align and support our ecosystem of security offerings
Trustwave PartnerOne Program
Join forces with Trustwave to protect against the most advance cybersecurity threats
SpiderLabs Blog

Trustwave Action Response: Zero-Day Vulnerability in Citrix ADC (CVE-2022-27518)

On Tuesday, December 13, a joint announcement from the United States NSA and Citrix announced a zero-day vulnerability in Citrix ADC. The vulnerability (CVE-2022-27518) is a critical unauthenticated Remote Code Execution (RCE) issue currently rated as CVSS 9.8. Patches are already available from Citrix. The NSA attributes the zero-day to APT5, a Chinese hacking collective. There is currently no guidance for how widespread the campaign has been or how long it's been ongoing.

Affected Versions

The vulnerability affects the following Citrix ADC and Citrix Gateway versions:  

  • Citrix ADC and Citrix Gateway: 13.0 before 13.0-58.32
  • Citrix ADC and Citrix Gateway: 12.1 before 12.1-65.25
  • Citrix ADC FIPS & NDcPP: 12.1 before 12.1-55.291  

Additionally, these instances must be configured with SAML SP or IdP to be affected. You can check if your Citrix ADC or Citrix Gateway is configured as a SAML SP or a SAML IdP by inspecting the ns.conf file for the following commands:

  • add authentication samlAction
  • add authentication samlIdPProfile

If either of the commands is present and if the version is one of the affected versions listed above, you should patch as soon as possible.


We recommend administrators patch all affected systems as soon as possible, especially if publicly exposed. If patching is not an immediate option, administrators should consider placing their affected systems behind a firewall/VPN and segmenting the systems away from other networks to minimize the spread of damage in the case of a compromise.


For more information on the vulnerability and the mitigations that Citrix has released, please view its blog here with recommended next steps. Additionally, the U.S. NSA has released a Threat Hunt guide with potential behavioral artifacts that may indicate compromise.

We are diligently monitoring the situation for exposure and associated attacks. As new information is released, we will update this blog.

Latest SpiderLabs Blogs

Network Isolation for DynamoDB with VPC Endpoint

DynamoDB is a fully managed NoSQL database service offered by Amazon Web Services (AWS). It is renowned for its scalability, dependability, and easy connection with other AWS services....

Read More

The Underdog of Cybersecurity: Uncovering Hidden Value in Threat Intelligence

Threat Intelligence, or just TI, is sometimes criticized for possibly being inaccurate or outdated. However, there are compelling reasons to incorporate it into your cybersecurity defense strategy....

Read More

Clockwork Blue: Automating Security Defenses with SOAR and AI

It’s impractical to operate security operations alone, using manual human processes. Finding opportunities to automate SecOps is an underlying foundation of Zero Trust and an essential architecture...

Read More