High Threat Security Alert (A26-08-33): Multiple Vulnerabilities in Citrix Products

Description:

Citrix has released security updates to address multiple vulnerabilities in Citrix products or components. An attacker could exploit these vulnerabilities by sending specially crafted requests to an affected system.

Reports indicated that the security restriction bypass vulnerability (CVE-2026-19490) is being exploited in the wild. System administrators are advised to take immediate action to patch affected systems to mitigate the elevated risk of cyber attacks.

Affected Systems:

• Citrix NetScaler Application Delivery Controller (ADC) and Citrix NetScaler Gateway 13.1 prior to version 13.1-63.21
• Citrix NetScaler Application Delivery Controller (ADC) and Citrix NetScaler Gateway 14.1 prior to version 14.1-73.32
• Citrix NetScaler Application Delivery Controller (ADC) FIPS prior to version 14.1-73.32 FIPS
• Citrix NetScaler Application Delivery Controller (ADC) FIPS and NDcPP prior to version 13.1-37.277

For detailed information of the affected systems, please refer to the corresponding security advisories at vendor's website.

Impact:

Successful exploitation of the vulnerabilities could lead to denial of service or security restriction bypass on an affected system.

Recommendation:

Patches for affected systems are now available. Administrators of affected systems should follow the recommendations provided by the product vendor and take immediate actions to mitigate the risk.

More Information:

• https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696939&articleTitle=NetScaler_ADC_and_NetScaler_Gateway_Security_Bulletin_for_CVE_2026_19489_and_CVE_2026_19490
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-19489 (to CVE-2026-19490)