CVE-2026-55238

published 2026-07-20

CVE-2026-55238: 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…

Priority P4 31 medium 5.3 CVSS 3.1

AV N AC L PR N UI N S U C N I N A L

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

1 ranges

Vendor	Product	Version range	Fixed in
neutrinolabs	xrdp	< 0.10.6.1	0.10.6.1

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CWE-126