Actively exploited in the wild
Citrix NetScaler Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability
Citrix - NetScaler · Listed in the CISA KEV since 2026-09-27. This indicates confirmed attacks in production environments.
Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
CVE-2026-88772
HighCVSS 8.1KEVSummary
Vulnerability in Citrix NetScaler ADC and Gateway leading to Remote Code Execution or Denial of Service.
Risk Assessment
An attacker could remotely execute code on the device or cause service unavailability, potentially leading to infrastructure compromise or service disruption.
Recommendation
Immediately update Citrix NetScaler ADC and Gateway to patched versions (e.g., 14.1-73.37, 13.1-64.23).
Other vulnerabilities in Citrix NetScaler ADC
See all- CVE-2016-9028High
An unauthorized redirect vulnerability in Citrix NetScaler ADC before version 10.1 135.8, 10.5 61.11, 11.0 65.31/65.35F, and 11.1 47.14 allows a remote attacker to steal session cookies of a legitimate AAA user via manipulation of the Host header.
- CVE-2026-88777Critical
Memory overflow vulnerability in Citrix NetScaler ADC and Gateway leading to unpredictable or erroneous behavior or Denial of Service.
- CVE-2026-88776Critical
Memory overflow vulnerability in Citrix NetScaler ADC and Gateway leading to unpredictable or erroneous behavior or Denial of Service.
- CVE-2026-88775Critical
Memory overflow vulnerability in Citrix NetScaler ADC and Gateway leading to unpredictable or erroneous behavior or Denial of Service.
- CVE-2026-88773Critical
HTTP Request/Response Smuggling vulnerability in Citrix NetScaler ADC and Gateway due to inconsistent interpretation of HTTP requests.
- CVE-2026-88771CriticalActively exploited
Improper input validation in Citrix NetScaler ADC and Gateway allows an unauthenticated attacker to execute arbitrary commands.
- CVE-2026-88778High
Predictable exact value from previous values vulnerability in Citrix NetScaler ADC and Gateway.
- CVE-2026-88774High
Vulnerability in Citrix NetScaler ADC and Gateway leading to a feature policy bypass due to improper HTTP URL based expression usage.
Original NVD description (English source)
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 Remote Code Execution or Denial of Service
Vulnerability data from NVD (NIST) · CISA KEV · EPSS