CVE-2026-55645
xrdp: Out-of-bounds read in Client Control PDU processing (xrdp_rdp_process_data_control)
Description
xrdp is an open source RDP server. Versions 0.10.6 and prior contain a vulnerability concerning the processing of Client Control PDUs. During the RDP connection sequence, the parser does not perform sufficient length validation before reading specific data fields from the network stream. A remote, unauthenticated attacker could potentially exploit this flaw by sending a specially crafted, truncated Client Control PDU. Due to missing bounds checks, the xrdp process may perform out-of-bounds memory reads, which can result in the termination of the service (Denial of Service). However, since xrdp forks a new process for each connection by default, an out-of-bounds read causing a process crash is unlikely to bring down the entire xrdp service.This issue has been fixed in version 0.10.6.1.
INFO
Published Date :
July 20, 2026, 5:18 p.m.
Last Modified :
Oct. 24, 2026, 8:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update xrdp to version 0.10.6.1 or newer.
- Apply vendor patches if available.
- Monitor for service availability after update.
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-2026-55645.
| URL | Resource |
|---|---|
| https://github.com/neutrinolabs/xrdp/releases/tag/v0.10.6.1 | Release Notes |
| https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-3m4m-h22g-c7xx | 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-2026-55645 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-2026-55645
weaknesses.
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).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-55645 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-55645 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.
-
CVE Translated by [email protected]
Oct. 24, 2026
Action Type Old Value New Value Added Translation Title: xrdp de neutrinolabs, Description: xrdp es un servidor RDP de código abierto. Las versiones 0.10.6 y anteriores contienen una vulnerabilidad concerniente al procesamiento de PDUs de Control de Cliente. Durante la secuencia de conexión RDP, el analizador no realiza una validación de longitud suficiente antes de leer campos de datos específicos del flujo de red. Un atacante remoto y no autenticado podría potencialmente explotar esta falla enviando una PDU de Control de Cliente truncada y especialmente diseñada. Debido a la falta de comprobaciones de límites, el proceso xrdp puede realizar lecturas de memoria fuera de límites, lo que puede resultar en la terminación del servicio (Denegación de Servicio). Sin embargo, dado que xrdp bifurca un nuevo proceso para cada conexión por defecto, es poco probable que una lectura fuera de límites que cause un fallo del proceso derribe todo el servicio xrdp. Este problema ha sido solucionado en la versión 0.10.6.1. -
Initial Analysis by [email protected]
Jul. 22, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:neutrinolabs:xrdp:*:*:*:*:*:*:*:* versions up to (excluding) 0.10.6.1 Added Reference Type GitHub, Inc.: https://github.com/neutrinolabs/xrdp/releases/tag/v0.10.6.1 Types: Release Notes Added Reference Type GitHub, Inc.: https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-3m4m-h22g-c7xx Types: Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 21, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-55645', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-07-21T15:23:55.354517Z'} -
New CVE Received by [email protected]
Jul. 20, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'neutrinolabs', 'product': 'xrdp', 'versions': [{'status': 'affected', 'version': '< 0.10.6.1'}]}] Added Description xrdp is an open source RDP server. Versions 0.10.6 and prior contain a vulnerability concerning the processing of Client Control PDUs. During the RDP connection sequence, the parser does not perform sufficient length validation before reading specific data fields from the network stream. A remote, unauthenticated attacker could potentially exploit this flaw by sending a specially crafted, truncated Client Control PDU. Due to missing bounds checks, the xrdp process may perform out-of-bounds memory reads, which can result in the termination of the service (Denial of Service). However, since xrdp forks a new process for each connection by default, an out-of-bounds read causing a process crash is unlikely to bring down the entire xrdp service.This issue has been fixed in version 0.10.6.1. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L Added CWE CWE-125 Added Reference https://github.com/neutrinolabs/xrdp/releases/tag/v0.10.6.1 Added Reference https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-3m4m-h22g-c7xx