CVE-2025-5777 PoC — NetScaler ADC and NetScaler Gateway - Insufficient input validation leading to memory overread

Source

https://github.com/idobarel/CVE-2025-5777

Associated Vulnerability

Title: NetScaler ADC and NetScaler Gateway - Insufficient input validation leading to memory overread (CVE-2025-5777)
Description:Insufficient input validation leading to memory overread when the NetScaler is configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server

Description

CitrixBleed2 poc

Readme

# CVE-2025-5777 
(AKA CitrixBleed 2) Is an OOB read in the login process of Citrix Gateway. <br>
This is a Proof of Concept exploiting the OOB (CVE-2025-5777) to obtain memory data from a vulnerable Citrix Gateway instance, possibly leading to cookies/credentials theft.

## Usage
I highly recommend using a `venv` when using the script. <br>
```
usage: main.py [-h] [-t THREADS] [-o OUTPUT] url

positional arguments:
  url                   target URL

options:
  -h, --help            show this help message and exit
  -t THREADS, --threads THREADS
                        number of threads [10]
  -o OUTPUT, --output OUTPUT
                        output file [leak.dump]
```

## Technical details
An amazing writeup by [@watchTowr](https://twitter.com/watchtowrcyber) || [watchtowr writeup](https://labs.watchtowr.com/how-much-more-must-we-bleed-citrix-netscaler-memory-disclosure-citrixbleed-2-cve-2025-5777/)

File Snapshot

Remarks

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