CVE-2026-55645 Details
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.
A moderate severity out-of-bounds read vulnerability has been identified in xrdp versions through 0.10.6. The issue arises in the processing of Client Control Protocol Data Units (PDUs) during the Remote Desktop Protocol (RDP) connection sequence. The vulnerability exists because the parser fails to validate the length of specific data fields before reading them from the network stream. This lack of proper bounds checking can lead to out-of-bounds memory reads, potentially causing the xrdp process to crash and terminate the service. However, since xrdp typically forks a new process for each connection, a process crash is unlikely to disrupt the entire xrdp service.
Users can upgrade to xrdp version 0.10.6.1 to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jul 21, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/neutrinolabs/xrdp/releases/tag/v0.10.6.1 | [email protected] | Release Notes |
| https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-3m4m-h22g-c7xx | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-125 | Out-of-bounds Read | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| neutrinolabs xrdp | < 0.10.6.1 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 22, 2026 | Initial Analysis | [email protected] |
| Jul 21, 2026 | CVE Modified | CISA-ADP |
| Jul 20, 2026 | New CVE Received | [email protected] |