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

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.
8.4	$0-$5k	0.00

Summaryinfo

A vulnerability described as critical has been identified in Citrix NetScaler ADC and NetScaler Gateway up to 37.240/47.47/55.329/59.21. Affected by this issue is some unknown functionality of the component Gateway. Such manipulation leads to memory corruption. This vulnerability is referenced as CVE-2025-7776. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Citrix NetScaler ADC and NetScaler Gateway up to 37.240/47.47/55.329/59.21. Affected by this issue is an unknown code block of the component Gateway. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Memory overflow vulnerability leading to unpredictable or erroneous behavior and Denial of Service in NetScaler ADC and NetScaler Gateway when NetScaler is configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) with PCoIP Profile bounded to it

The advisory is available at support.citrix.com. This vulnerability is handled as CVE-2025-7776 since 07/17/2025. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 09/04/2025).

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.

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

The vulnerability is also documented in the vulnerability database at Tenable (255232). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Network Management Software

Vendor

• Citrix

Name

• NetScaler ADC
• NetScaler Gateway

Version

• 37.240
• 47.0
• 47.1
• 47.2
• 47.3
• 47.4
• 47.5
• 47.6
• 47.7
• 47.8
• 47.9
• 47.10
• 47.11
• 47.12
• 47.13
• 47.14
• 47.15
• 47.16
• 47.17
• 47.18
• 47.19
• 47.20
• 47.21
• 47.22
• 47.23
• 47.24
• 47.25
• 47.26
• 47.27
• 47.28
• 47.29
• 47.30
• 47.31
• 47.32
• 47.33
• 47.34
• 47.35
• 47.36
• 47.37
• 47.38
• 47.39
• 47.40
• 47.41
• 47.42
• 47.43
• 47.44
• 47.45
• 47.46
• 47.47
• 55.329
• 59.0
• 59.1
• 59.2
• 59.3
• 59.4
• 59.5
• 59.6
• 59.7
• 59.8
• 59.9
• 59.10
• 59.11
• 59.12
• 59.13
• 59.14
• 59.15
• 59.16
• 59.17
• 59.18
• 59.19
• 59.20
• 59.21

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: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔒

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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

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

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
09/04/2025 +8 days VulDB entry last update

Sourcesinfo

Vendor: citrix.com

Advisory: CTX694938
Status: Confirmed

CVE: CVE-2025-7776 (🔒)
GCVE (CVE): GCVE-0-2025-7776
GCVE (VulDB): GCVE-100-321410

Entryinfo

Created: 08/26/2025 15:52
Updated: 09/04/2025 01:48
Changes: 08/26/2025 15:52 (69), 08/26/2025 22:05 (2), 09/04/2025 01:48 (12)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion

Want to stay up to date on a daily basis?

Enable the mail alert feature now!