# CVE-2026-33516: xrdp: xrdp is an open source RDP server

CVE-2026-33516 is fixed in xrdp on 1 platform, first by DEBIAN-CVE-2026-33516, released April 17, 2026. It is not reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2026-33516
- Priority: Urgent
- CVSS: 9.1 (critical)
- EPSS: 0.0043
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 17, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | xrdp Debian 12.15 (bookworm) | 0.9.21.1-1+deb12u3 | [DEBIAN-CVE-2026-33516](https://patchblox.com/security/data/fix/linux/debian-cve-2026-33516.md) | Apr 17, 2026 |
| Linux | xrdp Debian 13.5 (trixie) | 0.10.1-3.1+deb13u2 | [DEBIAN-CVE-2026-33516](https://patchblox.com/security/data/fix/linux/debian-cve-2026-33516.md) | Apr 17, 2026 |
| Linux | xrdp Debian 14 | 0.10.6-1 | [DEBIAN-CVE-2026-33516](https://patchblox.com/security/data/fix/linux/debian-cve-2026-33516.md) | Apr 17, 2026 |

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Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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