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.
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History
Mon, 20 Jul 2026 23:15:00 +0000
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Neutrinolabs
Neutrinolabs xrdp |
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Neutrinolabs
Neutrinolabs xrdp |
Mon, 20 Jul 2026 19:30:00 +0000
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ssvc
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Mon, 20 Jul 2026 17:15:00 +0000
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| 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. | |
| Title | xrdp: Malformed Confirm Active capability sets cause out-of-bounds reads | |
| Weaknesses | CWE-126 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-07-20T19:07:08.673Z
Reserved: 2026-06-16T16:44:00.624Z
Link: CVE-2026-55238
Updated: 2026-07-20T19:01:35.356Z
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OpenCVE Enrichment
Updated: 2026-07-20T23:00:14Z