CVE-2026-33516 PUBLISHED

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

Assigner: GitHub_M
Reserved: 20.03.2026 Published: 17.04.2026 Updated: 17.04.2026

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.

Metrics

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS Score: 7.7

Product Status

Vendor neutrinolabs
Product xrdp
Versions
  • Version < 0.10.6 is affected

References

Problem Types

  • CWE-125: Out-of-bounds Read CWE