Citrix NetScaler ADC/NetScaler Gateway up to 37.240/47.47/55.329/59.21 Gateway/IPv6 Service CitrixDeelb memory corruption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.7$5k-$25k0.00

Summaryinfo

A vulnerability labeled as critical has been found in Citrix NetScaler ADC and NetScaler Gateway up to 37.240/47.47/55.329/59.21. Affected is an unknown function of the component Gateway/IPv6 Service. The manipulation results in memory corruption. This vulnerability was named CVE-2025-7775. The attack may be performed from remote. In addition, an exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical has been found in Citrix NetScaler ADC and NetScaler Gateway up to 37.240/47.47/55.329/59.21. Affected is an unknown part of the component Gateway/IPv6 Service. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Memory overflow vulnerability leading to Remote Code Execution and/or Denial of Service in NetScaler ADC and NetScaler Gateway when NetScaler is configured as Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server (OR) NetScaler ADC and NetScaler Gateway 13.1, 14.1, 13.1-FIPS and NDcPP: LB virtual servers of type (HTTP, SSL or HTTP_QUIC) bound with IPv6 services or servicegroups bound with IPv6 servers (OR) NetScaler ADC and NetScaler Gateway 13.1, 14.1, 13.1-FIPS and NDcPP: LB virtual servers of type (HTTP, SSL or HTTP_QUIC) bound with DBS IPv6 services or servicegroups bound with IPv6 DBS servers (OR) CR virtual server with type HDX

The advisory is shared for download at support.citrix.com. This vulnerability is traded as CVE-2025-7775 since 07/17/2025. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are unknown but an exploit is available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 09/02/2025).

It is declared as attacked. The vulnerability scanner Nessus provides a plugin with the ID 255232 (NetScaler ADC and NetScaler Gateway Multiple Vulnerabilities (CTX694938)), which helps to determine the existence of the flaw in a target environment. This issue was added on 08/26/2025 to the CISA Known Exploited Vulnerabilities Catalog with a due date of 08/28/2025:

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Upgrading to version 37.241, 47.48, 55.330 or 59.22 eliminates this vulnerability.

The vulnerability is also documented in the databases at Zero-Day.cz (1023) and Tenable (255232). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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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: 8.9
VulDB Meta Temp Score: 8.7

VulDB Base Score: 8.1
VulDB Temp Score: 7.7
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
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: 🔒

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Nessus ID: 255232
Nessus Name: NetScaler ADC and NetScaler Gateway Multiple Vulnerabilities (CTX694938)

Zero-Day.cz: 🔒

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: NetScaler ADC/NetScaler Gateway 37.241/47.48/55.330/59.22

Timelineinfo

07/17/2025 CVE reserved
08/26/2025 +40 days Advisory disclosed
08/26/2025 +0 days VulDB entry created
09/02/2025 +7 days VulDB entry last update

Sourcesinfo

Vendor: citrix.com

Advisory: CTX694938
Status: Confirmed

CVE: CVE-2025-7775 (🔒)
GCVE (CVE): GCVE-0-2025-7775
GCVE (VulDB): GCVE-100-321408
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 08/26/2025 15:51
Updated: 09/02/2025 20:54
Changes: 08/26/2025 15:51 (69), 08/26/2025 22:05 (2), 08/27/2025 03:40 (13), 08/27/2025 14:05 (1), 08/27/2025 16:53 (11), 08/28/2025 13:20 (1), 09/02/2025 20:54 (2)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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