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Vulnerability Details CVE-2026-33689

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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 47.6%
CVSS Severity
CVSS v3 Score 9.1
Products affected by CVE-2026-33689


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