by Kastro
Paper/Archive/CVE-2026-33516

CVE-2026-33516

neutrinolabs xrdp — xrdp: Pre-authentication out-of-bounds reads in RDP capability and channel parsers

EPSS 0.4%CVSS 9.1
critical.is priorityof 100
35
CVSS 9.1 (NVD)9.1 / 10 × 3027.3Not in CISA KEV+300.0EPSS percentile 36.9.369 × 207.4No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
xrdp< 0.10.6–CNA

Scores by source

NVD9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
GitHub_M (CNA)7.7CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refgithub.com/neutrinolabs/xrdp/security/advisories/GHSA-rvh9-9wm3-28c7refgithub.com/neutrinolabs/xrdp/releases/tag/v0.10.6