VDB-410911 · CVE-2026-88772 · EUVD-2026-87959

Citrix NetScaler ADC/NetScaler Gateway code injection

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
9.5	$5k-$25k	1.47

Summaryinfo

A vulnerability marked as very critical has been reported in Citrix NetScaler ADC and NetScaler Gateway. The affected element is an unknown function. This manipulation causes code injection. This vulnerability is handled as CVE-2026-88772. The attack can be initiated remotely. Additionally, an exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Citrix NetScaler ADC and NetScaler Gateway. It has been declared as very critical. Affected by this vulnerability is an unknown code. The manipulation with an unknown input leads to a code injection vulnerability. The CWE definition for the vulnerability is CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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

This vulnerability is known as CVE-2026-88772 since 09/10/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details are unknown but an exploit is available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 09/28/2026). The attack technique deployed by this issue is T1059 according to MITRE ATT&CK.

It is declared as attacked. The vulnerability scanner Nessus provides a plugin with the ID 350844 (NetScaler ADC and NetScaler Gateway 13.1 < 13.1-64.23 / 14.1 < 14.1-73.37 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. The CISA Known Exploited Vulnerabilities Catalog lists this issue since 09/27/2026 with a due date of 09/30/2026:

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 BO

Upgrading to version 14.1-73.37, 13.1-64.23, 14.1-73.37 FIPS or 13.1.37.279 FIPS and NDcPP eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (350844) and EUVD (EUVD-2026-87959). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Network Management Software

Vendor

Citrix

Name

License

commercial

Website

Vendor: https://www.citrix.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 9.9
VulDB Meta Temp Score: 9.5

VulDB Base Score: 9.9
VulDB Temp Score: 9.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Code injection
CWE: CWE-94 / CWE-74 / CWE-707
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Attacked

EPSS Score: 🔒
EPSS Percentile: 🔒

KEV Added: 🔒
KEV Due: 🔒
KEV Remediation: 🔒
KEV Ransomware: 🔒
KEV Notice: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 350844
Nessus Name: NetScaler ADC and NetScaler Gateway 13.1 < 13.1-64.23 / 14.1 < 14.1-73.37 Multiple Vulnerabilities

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: NetScaler ADC/NetScaler Gateway 14.1-73.37/13.1-64.23/14.1-73.37 FIPS/13.1.37.279 FIPS and NDcPP