neutrinolabs xrdp up to 0.10.5 NeutrinoRDP heap-based overflow

Summaryinfo

A vulnerability has been found in neutrinolabs xrdp up to 0.10.5 and classified as critical. This issue affects some unknown processing of the component NeutrinoRDP Module. The manipulation leads to heap-based overflow. This vulnerability is traded as CVE-2026-32623. It is possible to initiate the attack remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in neutrinolabs xrdp up to 0.10.5. It has been rated as critical. This issue affects an unknown part of the component NeutrinoRDP Module. The manipulation with an unknown input leads to a heap-based overflow vulnerability. Using CWE to declare the problem leads to 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(). Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-32623 since 03/12/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available.

Upgrading to version 0.10.6 eliminates this vulnerability. The upgrade is hosted for download at github.com.

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Productinfo

Vendor

• neutrinolabs

Name

• xrdp

Version

• 0.10.0
• 0.10.1
• 0.10.2
• 0.10.3
• 0.10.4
• 0.10.5

Website

• Product: https://github.com/neutrinolabs/xrdp/

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