# CVE-2026-55238

## Summary

- **CVE ID:** CVE-2026-55238
- **Severity:** MEDIUM
- **CVSS Score:** 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
- **CWE:** CWE-126
- **Published:** Jul 20, 2026
- **Last Modified:** Jul 20, 2026

## Description

xrdp is an open source RDP server. Versions 0.10.6 and prior contain a vulnerability concerning the processing of RDP Confirm Active PDU, where during the capability negotiation phase, the parser did not perform sufficient length validation for specific capability sets. A remote, unauthenticated attacker could potentially exploit this flaw by sending a specially crafted RDP packet containing malformed capability data. 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.

## Affected Products

- neutrinolabs — xrdp (< 0.10.6.1)

## References

- [CNA](https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-mg8j-x9rw-9xv3)
- [CNA](https://github.com/neutrinolabs/xrdp/releases/tag/v0.10.6.1)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.30%
- **EPSS Percentile:** 23.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._