CVE-2026-32623
Received Received - Intake
Heap-Based Buffer Overflow in xrdp NeutrinoRDP Enables RCE

Publication date: 2026-04-17

Last updated on: 2026-04-27

Assigner: GitHub, Inc.

Description
xrdp is an open source RDP server. Versions through 0.10.5 contain a heap-based buffer overflow vulnerability in the NeutrinoRDP module. When proxying RDP sessions from xrdp to another server, the module fails to properly validate the size of reassembled fragmented virtual channel data against its allocated memory buffer. A malicious downstream RDP server (or an attacker capable of performing a Man-in-the-Middle attack) could exploit this flaw to cause memory corruption, potentially leading to a Denial of Service (DoS) or Remote Code Execution (RCE). The NeutrinoRDP module is not built by default. This vulnerability only affects environments where the module has been explicitly compiled and enabled. Users can verify if the module is built by checking for --enable-neutrinordp in the output of the xrdp -v command. This issue has been fixed in version 0.10.6.
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Meta Information
Published
2026-04-17
Last Modified
2026-04-27
Generated
2026-06-16
AI Q&A
2026-04-17
EPSS Evaluated
2026-06-15
NVD
CVE-2026-32623
EUVD
EUVD-2026-23504
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
neutrinolabs xrdp to 0.10.6 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-122 A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
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Executive Summary

This vulnerability exists in xrdp, an open source Remote Desktop Protocol (RDP) server, specifically in its NeutrinoRDP module up to version 0.10.5.

The issue is a heap-based buffer overflow caused by improper validation of the size of reassembled fragmented virtual channel data against its allocated memory buffer when proxying RDP sessions.

A malicious downstream RDP server or an attacker capable of performing a Man-in-the-Middle attack could exploit this flaw to cause memory corruption.

This memory corruption can potentially lead to Denial of Service (DoS) or Remote Code Execution (RCE).

The vulnerability only affects environments where the NeutrinoRDP module has been explicitly compiled and enabled.

It was fixed in version 0.10.6 of xrdp.

Impact Analysis

If you are using xrdp with the NeutrinoRDP module enabled, this vulnerability could allow an attacker to cause memory corruption.

The impact of this memory corruption could be a Denial of Service (DoS), making the service unavailable.

More severely, it could allow Remote Code Execution (RCE), enabling an attacker to execute arbitrary code on the affected system.

This could lead to full system compromise depending on the privileges of the xrdp process.

Detection Guidance

To detect this vulnerability on your system, you can check if the NeutrinoRDP module is built and enabled in your xrdp installation. This can be done by running the command 'xrdp -v' and verifying if the output includes the flag '--enable-neutrinordp'.

Mitigation Strategies

Immediate mitigation steps include upgrading xrdp to version 0.10.6 or later, where this vulnerability has been fixed.

If upgrading is not immediately possible, ensure that the NeutrinoRDP module is not enabled or compiled in your xrdp build, as the vulnerability only affects environments where this module is explicitly compiled and enabled.

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