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8.8
HIGH CVSS 4.0
CVE-2025-7776
Citrix NetScaler Memory Overflow Denial of Service
Description

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

INFO

Published Date :

Aug. 26, 2025, 1:15 p.m.

Last Modified :

Aug. 26, 2025, 1:41 p.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Affected Products

The following products are affected by CVE-2025-7776 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

No affected product recoded yet

: Total Affected Vendor : 0 | Products : 0
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 4.0 HIGH [email protected]
Solution
Update NetScaler ADC and Gateway to patch memory overflow vulnerability.
  • Update NetScaler ADC and Gateway software.
  • Re-evaluate PCoIP profile configurations.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2025-7776.

URL Resource
https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX694938
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-7776 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-7776 weaknesses.

CAPEC-8: Buffer Overflow in an API Call Buffer Overflow in an API Call CAPEC-9: Buffer Overflow in Local Command-Line Utilities Buffer Overflow in Local Command-Line Utilities CAPEC-10: Buffer Overflow via Environment Variables Buffer Overflow via Environment Variables CAPEC-14: Client-side Injection-induced Buffer Overflow Client-side Injection-induced Buffer Overflow CAPEC-24: Filter Failure through Buffer Overflow Filter Failure through Buffer Overflow CAPEC-42: MIME Conversion MIME Conversion CAPEC-44: Overflow Binary Resource File Overflow Binary Resource File CAPEC-45: Buffer Overflow via Symbolic Links Buffer Overflow via Symbolic Links CAPEC-46: Overflow Variables and Tags Overflow Variables and Tags CAPEC-47: Buffer Overflow via Parameter Expansion Buffer Overflow via Parameter Expansion CAPEC-100: Overflow Buffers Overflow Buffers CAPEC-123: Buffer Manipulation Buffer Manipulation

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-7776 vulnerability anywhere in the article.

  • BleepingComputer
Over 28,000 Citrix devices vulnerable to new exploited RCE flaw

More than 28,200 Citrix instances are vulnerable to a critical remote code execution vulnerability tracked as CVE-2025-7775 that is already being exploited in the wild. The vulnerability affects NetSc ... Read more

Published Date: Aug 27, 2025 (21 hours, 46 minutes ago)
  • TheCyberThrone
Citrix NetScaler Patch Release: Act Now to Prevent Exploitation

August 27, 2025On August 26, 2025, Citrix announced a pivotal security update for NetScaler ADC and NetScaler Gateway appliances. This urgent patch addresses several high-impact vulnerabilities, inclu ... Read more

Published Date: Aug 27, 2025 (1 day, 11 hours ago)
  • BleepingComputer
Citrix fixes critical NetScaler RCE flaw exploited in zero-day attacks

Citrix fixed three NetScaler ADC and NetScaler Gateway flaws today, including a critical remote code execution flaw tracked as CVE-2025-7775 that was actively exploited in attacks as a zero-day vulner ... Read more

Published Date: Aug 26, 2025 (1 day, 16 hours ago)
  • CybersecurityNews
Citrix NetScaler ADC and Gateway 0-Day RCE Vulnerability Actively Exploited in Attacks

Cloud Software Group has disclosed multiple high-severity vulnerabilities in NetScaler ADC (formerly Citrix ADC) and NetScaler Gateway (formerly Citrix Gateway) that can lead to remote code execution ... Read more

Published Date: Aug 26, 2025 (1 day, 22 hours ago)
  • Daily CyberSecurity
URGENT: NetScaler Zero-Day CVE-2025-7775 Under Active Attack

The Cloud Software Group (CSG) has released urgent security updates to address three high-severity vulnerabilities affecting NetScaler ADC and NetScaler Gateway appliances. The flaws, tracked as CVE-2 ... Read more

Published Date: Aug 26, 2025 (1 day, 23 hours ago)
  • Help Net Security
NetScaler ADC/Gateway zero-day exploited by attackers (CVE-2025-7775)

Three new vulnerabilities affecting (Citrix) NetScaler application delivery controller (ADC) and Gateway devices have been made public, one of which (CVE-2025-7775) has been targeted in zero-day attac ... Read more

Published Date: Aug 26, 2025 (2 days ago)

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2025-7776 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • New CVE Received by [email protected]

    Aug. 26, 2025

    Action Type Old Value New Value
    Added Description 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
    Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
    Added CWE CWE-119
    Added Reference https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX694938
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 8.8
Attack Vector
Attack Complexity
Attack Requirements
Privileges Required
User Interaction
VS Confidentiality
VS Integrity
VS Availability
SS Confidentiality
SS Integrity
SS Availability