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Known Exploited Vulnerability
9.8
CRITICAL CVSS 3.1
CVE-2025-7775
Citrix NetScaler Memory Overflow Vulnerability - [Actively Exploited]
Description

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

INFO

Published Date :

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

Last Modified :

Aug. 27, 2025, 2:26 p.m.

Remotely Exploit :

Yes !

Source :

[email protected]
CISA Notification
CISA KEV (Known Exploited Vulnerabilities)

For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.

Description :

Citrix NetScaler ADC and NetScaler Gateway contain a memory overflow vulnerability that could allow for remote code execution and/or denial of service.

Required Action :

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

Notes :

https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX694938 ; https://nvd.nist.gov/vuln/detail/CVE-2025-7775

Affected Products

The following products are affected by CVE-2025-7775 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.

ID Vendor Product Action
1 Citrix netscaler_application_delivery_controller
2 Citrix netscaler_gateway
: Total Affected Vendor : 1 | Products : 2
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 3.1 CRITICAL [email protected]
CVSS 4.0 CRITICAL [email protected]
Solution
Update NetScaler ADC and Gateway to a fixed version to address memory corruption.
  • Update NetScaler ADC and Gateway to a fixed version.
  • Apply the latest security patches and updates from the vendor.
  • Review and update configurations for virtual servers.
Public PoC/Exploit Available at Github

CVE-2025-7775 has a 4 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

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-2025-7775.

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

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-7775 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-2025-7775 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).

Profile Photo
DevGreick/devgreick

None

Python

Updated: 12 hours, 52 minutes ago
1 stars 0 fork 0 watcher
Born at : Oct. 29, 2024, 8:10 p.m. This repo has been linked 10 different CVEs too.
Profile Photo
ums91/CISA_BOT

CISA Bot is a GitHub bot that automatically monitors the Cybersecurity and Infrastructure Security Agency (CISA) Known Exploited Vulnerabilities (KEV) Catalog. When new vulnerabilities are published in the KEV, the bot creates GitHub issues in this repository with detailed information about each vulnerability.

Python

Updated: 17 hours, 7 minutes ago
2 stars 1 fork 1 watcher
Born at : Oct. 29, 2024, 10:19 a.m. This repo has been linked 205 different CVEs too.
Profile Photo
frlc/frlc

None

Updated: 1 day ago
0 stars 0 fork 0 watcher
Born at : Dec. 7, 2023, 3:29 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
0xAtef/0xAtef

None

Updated: 1 day, 1 hour ago
0 stars 0 fork 0 watcher
Born at : Jan. 14, 2023, 11:38 a.m. This repo has been linked 1 different CVEs too.

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

The following list is the news that have been mention CVE-2025-7775 vulnerability anywhere in the article.

  • CybersecurityNews
28,000+ Citrix Servers Exposed to Active 0-Day RCE Vulnerability Exploited in the Wild

A critical zero-day remote code execution (RCE) vulnerability, tracked as CVE-2025-7775, is affecting over 28,000 Citrix instances worldwide. The flaw is being actively exploited in the wild, promptin ... Read more

Published Date: Aug 27, 2025 (28 minutes ago)
  • 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 (2 hours, 22 minutes ago)
  • security.nl
NCSC-script kan ook misbruik van nieuwe Citrix-lekken detecteren

Het Nationaal Cyber Security Centrum (NCSC) heeft een eerder gepubliceerd script aangepast zodat organisaties webshells op hun Citrix-systemen kunnen detecteren die daar via nieuwe kwetsbaarheden op z ... Read more

Published Date: Aug 27, 2025 (10 hours, 30 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 (16 hours, 35 minutes 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 (21 hours, 32 minutes 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, 3 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, 4 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 (1 day, 5 hours ago)
  • Daily CyberSecurity
A New Bridge Between Worlds? Google’s Quick Share May Be Coming to iPhone

At the end of 2024, reports surfaced suggesting that Google was working on a Quick Share feature for iOS and macOS, designed to let users seamlessly transfer files from Android devices to Apple platfo ... Read more

Published Date: Aug 26, 2025 (1 day, 10 hours ago)
  • Daily CyberSecurity
Microsoft Unveils a New Tool to Help Businesses Ditch VMware for Hyper-V

For reasons of compliance and data governance, many large enterprises prefer to purchase servers for on-premises deployment, then rely on virtualization technology to create multiple virtual machines ... Read more

Published Date: Aug 26, 2025 (1 day, 15 hours ago)
  • Daily CyberSecurity
A New Home for Gemini: Google Unveils Next-Gen Smart Home Devices

At the recent Made by Google event in New York, Google unveiled the Pixel 10 series, Pixel Watch 4, and Pixel Buds 2a. Keen-eyed attendees, however, also noticed what appeared to be a new smart speake ... Read more

Published Date: Aug 26, 2025 (1 day, 15 hours ago)
  • Daily CyberSecurity
A Glassy Future: Apple to Launch Foldable iPhone, Eyeing a Radical 2027 Redesign

Rumors have long circulated that Apple plans to launch its first foldable iPhone in 2026, and according to information obtained by Bloomberg, the company intends to reintroduce the Touch ID fingerprin ... Read more

Published Date: Aug 26, 2025 (1 day, 15 hours 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-2025-7775 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.

  • Initial Analysis by [email protected]

    Aug. 27, 2025

    Action Type Old Value New Value
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    Added CPE Configuration OR *cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:* versions from (including) 13.1 up to (excluding) 13.1-59.22 *cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:* versions from (including) 14.1 up to (excluding) 14.1-47.48 *cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:* versions from (including) 12.1 up to (excluding) 12.1-55.330 *cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:* versions from (including) 13.1 up to (excluding) 13.1-37.241 *cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:ndcpp:*:*:* versions from (including) 12.1 up to (excluding) 12.1-55.330 *cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:ndcpp:*:*:* versions from (including) 13.1 up to (excluding) 13.1-37.241
    Added CPE Configuration OR *cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:* versions from (including) 13.1 up to (excluding) 13.1-59.22 *cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:* versions from (including) 14.1 up to (excluding) 14.1-47.48
    Added Reference Type Citrix Systems, Inc.: https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX694938 Types: Vendor Advisory
  • CVE CISA KEV Update by 9119a7d8-5eab-497f-8521-727c672e3725

    Aug. 27, 2025

    Action Type Old Value New Value
    Added Date Added 2025-08-26
    Added Due Date 2025-08-28
    Added Required Action Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
    Added Vulnerability Name Citrix NetScaler Memory Overflow Vulnerability
  • New CVE Received by [email protected]

    Aug. 26, 2025

    Action Type Old Value New Value
    Added Description 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
    Added CVSS V4.0 AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/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: 9.2
Attack Vector
Attack Complexity
Attack Requirements
Privileges Required
User Interaction
VS Confidentiality
VS Integrity
VS Availability
SS Confidentiality
SS Integrity
SS Availability
Base CVSS Score: 9.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact