ExploitPublished 11 Aug 2025

Citrix NetScaler ADC/Gateway 14.1 · Memory Disclosure

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Severity

Medium

Rated by Threat Radar

Data as of 8 Nov 2025, 02:50 UTC

What to do

AI-suggested

Immediate network segmentation: Isolate Citrix NetScaler ADC/Gateway devices from public networks and restrict access to trusted management networks only.
Deploy strict firewall rules to limit inbound traffic to necessary sources and ports, reducing exposure to remote exploitation.
Monitor network traffic and device logs for unusual access patterns or memory access attempts indicative of exploitation.
Implement multi-factor authentication (MFA) on all administrative access points to reduce risk from credential compromise.
Regularly audit and inventory all Citrix NetScaler devices to identify those running version 14.1 and prioritize them for remediation.
Engage with Citrix support and subscribe to security advisories to obtain patches or workarounds as soon as they become available.
Consider deploying intrusion detection/prevention systems (IDS/IPS) with signatures targeting this specific exploit once available.
Educate security teams about the exploit's characteristics and ensure incident response plans include procedures for memory disclosure incidents.
If patching is delayed, consider temporary mitigations such as disabling vulnerable services or features that handle memory operations exposed remotely.

Description

Citrix NetScaler ADC/Gateway 14.1 - Memory Disclosure

Impact

For European organizations, this vulnerability poses a significant risk to the confidentiality of sensitive data handled by Citrix NetScaler ADC/Gateway appliances. Exposure of memory contents could lead to leakage of authentication credentials, session tokens, or cryptographic material, enabling attackers to impersonate legitimate users or decrypt secure communications. This can result in unauthorized access to internal systems, data exfiltration, and potential disruption of business operations. Sectors such as finance, healthcare, government, and critical infrastructure that rely heavily on secure remote access solutions are particularly vulnerable. The medium severity rating reflects that while the vulnerability does not directly cause denial of service or data integrity loss, the confidentiality breach can have cascading effects on organizational security posture. Additionally, the presence of exploit code increases the likelihood of exploitation attempts, necessitating urgent attention. European organizations with exposed or internet-facing NetScaler devices face an elevated risk, especially if network segmentation and monitoring are insufficient.

Indicators of compromise

Exploit source code

Exploit code for Citrix NetScaler ADC/Gateway 14.1 - Memory Disclosure3,278 characters

# Exploit Title: Citrix NetScaler ADC/Gateway 14.1 - Memory Disclosure
# Exploit Author: Yesith Alvarez
# Vendor Homepage: hhttps://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX693420
# CVE: CVE-2025-5777
# Link: https://github.com/yealvarez/CVE/blob/main/CVE-2025-5777/exploit.py

import re
import sys
import warnings
import requests
from time import sleep
from requests.packages.urllib3.exceptions import InsecureRequestWarning


def title():
    print(r'''
  ______     ______…

References

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