# CVE-2026-33689

> Vulnerability · severity: **CRITICAL** (CVSS 9.1).

## Description

xrdp is an open source RDP server. Versions through 0.10.5 have an out-of-bounds read vulnerability in the pre-authentication RDP message parsing logic. A remote, unauthenticated attacker can trigger this flaw by sending a specially crafted sequence of packets during the initial connection phase. This vulnerability results from insufficient validation of input buffer lengths before processing dynamic channel communication. Successful exploitation can lead to a denial-of-service (DoS) condition via a process crash or potential disclosure of sensitive information from the service's memory space. This issue has been fixed in version 0.10.6.

## Key facts

- **CVE ID:** CVE-2026-33689
- **Published:** 2026-04-17
- **CVSS severity:** CRITICAL
- **CVSS base score:** 9.1
- **CWE codes:** CWE-125

## Affected products

- `neutrinolabs:xrdp`

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-33689

## Citation

> AI Analytics. CVE-2026-33689. Retrieved 2026-07-19 from https://api.ai-analytics.org/cve/CVE-2026-33689. Derived from NIST NVD. Licensed CC0.

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