CVE-2026-33516
xrdp: Pre-authentication out-of-bounds reads in RDP capability and channel parsers
Description
xrdp is an open source RDP server. Versions through 0.10.5 contain an out-of-bounds read vulnerability during the RDP capability exchange phase. The issue occurs when memory is accessed before validating the remaining buffer length. A remote, unauthenticated attacker can trigger this vulnerability by sending a specially crafted Confirm Active PDU. Successful exploitation could lead to a denial of service (process crash) or potential disclosure of sensitive information from the process memory. This issue has been fixed in version 0.10.6.
INFO
Published Date :
April 17, 2026, 8:16 p.m.
Last Modified :
April 27, 2026, 2:15 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update xrdp to version 0.10.6 or newer.
- Apply security patches for xrdp.
- Validate memory access before buffer reads.
Public PoC/Exploit Available at Github
CVE-2026-33516 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
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-2026-33516.
| URL | Resource |
|---|---|
| https://github.com/neutrinolabs/xrdp/releases/tag/v0.10.6 | Patch Release Notes |
| https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-rvh9-9wm3-28c7 | 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-2026-33516 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-2026-33516
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).
Starred Repositories Release Tracker
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-33516 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-33516 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.
-
Initial Analysis by [email protected]
Apr. 27, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H Added CPE Configuration OR *cpe:2.3:a:neutrinolabs:xrdp:*:*:*:*:*:*:*:* versions up to (excluding) 0.10.6 Added Reference Type GitHub, Inc.: https://github.com/neutrinolabs/xrdp/releases/tag/v0.10.6 Types: Patch, Release Notes Added Reference Type GitHub, Inc.: https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-rvh9-9wm3-28c7 Types: Vendor Advisory -
New CVE Received by [email protected]
Apr. 17, 2026
Action Type Old Value New Value Added Description xrdp is an open source RDP server. Versions through 0.10.5 contain an out-of-bounds read vulnerability during the RDP capability exchange phase. The issue occurs when memory is accessed before validating the remaining buffer length. A remote, unauthenticated attacker can trigger this vulnerability by sending a specially crafted Confirm Active PDU. Successful exploitation could lead to a denial of service (process crash) or potential disclosure of sensitive information from the process memory. This issue has been fixed in version 0.10.6. Added CVSS V4.0 AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-125 Added Reference https://github.com/neutrinolabs/xrdp/releases/tag/v0.10.6 Added Reference https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-rvh9-9wm3-28c7