What’s Vulnerable › Vulnerabilities

CVE-2026-88774: Feature policy bypass due to improper HTTP URL based expression usage

• Severity: high (CVSS 7.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-27 · updated 2026-09-29
• Weakness: CWE-20

Description

Vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway. This issue affects ADC: before 14.1-73.37, before 13.1-64.23, before 14.1-73.37 FIPS, and before 13.1.37.279 FIPS and NDcPP; Gateway: before 14.1-73.37 and before 13.1-64.23 leading to a feature policy bypass due to improper HTTP URL based expression usage.

Affected products

• Citrix NetScaler ADC: from 13.1 before 13.1-64.23; from 14.1 before 14.1-73.37 — fixed in 13.1-64.23, 14.1-73.37
• Citrix Netscaler Application Delivery Controller Fips: from 13.1 before 13.1.37.279; from 14.1-66.68 through 14.1-73.37 — fixed in 13.1.37.279
• Citrix Netscaler Application Delivery Controller Ndcpp: from 13.1 before 13.1.37.279 — fixed in 13.1.37.279
• Citrix NetScaler Gateway: from 13.1 before 13.1-64.23; from 14.1 before 14.1-73.37 — fixed in 13.1-64.23, 14.1-73.37
• NetScaler ADC: before 14.1-73.37; before 13.1-64.23; before 14.1-73.37 FIPS; before 13.1.37.279 FIPS and NDcPP — fixed in 14.1-73.37, 13.1-64.23, 14.1-73.37 FIPS, 13.1.37.279 FIPS and NDcPP
• NetScaler Gateway: before 14.1-73.37; before 13.1-64.23 — fixed in 14.1-73.37, 13.1-64.23

How to fix

Upgrade to a fixed version: Citrix NetScaler ADC 13.1-64.23, 14.1-73.37; Citrix Netscaler Application Delivery Controller Fips 13.1.37.279; Citrix Netscaler Application Delivery Controller Ndcpp 13.1.37.279; Citrix NetScaler Gateway 13.1-64.23, 14.1-73.37; NetScaler ADC 14.1-73.37, 13.1-64.23, 14.1-73.37 FIPS, 13.1.37.279 FIPS and NDcPP; NetScaler Gateway 14.1-73.37, 13.1-64.23. Check the vendor advisory for mitigations.

In the news

• 2026-014: Critical Vulnerabilities in Citrix NetScaler ADC and Gateway
• Here We Go Again (Citrix NetScaler DTLS Preauth Memory Overflow CVE-2026-88772)
• Oh Look, The Foot Gun Went Off Again (Citrix NetScaler PreAuth Command Injection CVE-2026-88771)

References

• https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697096&articleTitle=Citrix_NetScaler_ADC_and_Citrix_NetScaler_Gateway_Security_Bulletin_for_CVE_2026_88771_CVE_2026_88772_CVE_2026_88773_CVE_2026_88774_CVE_2026_88775_CVE_2026_88776_CVE_2026_88777_and_CVE_2026_88778

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