CVE-2026-41252
CriticalCVSS 9.8Exploitation Probability (EPSS)
Elevated risk62th percentile - higher than 62% of all known CVEs
Summary
xrdp versions up to 0.10.6 have a missing bounds check in vnc-any mode, leading to a heap-based buffer overflow when handling RFB color map messages from a VNC server. A malicious VNC server can send crafted messages with out-of-range values, causing an out-of-bounds write on the heap.
Risk Assessment
This vulnerability can lead to denial of service (DoS) or potentially remote code execution before authentication, compromising the RDP server.
Recommendation
Update xrdp to version 0.10.6.1 or later, which contains the fix.
Original NVD description (English source)
xrdp is an open source RDP server. Versions 0.10.6 and prior contain a missing bounds check in xrdp, which allows a heap-based buffer overflow when operating in vnc-any mode. The issue occurs during the handling of RFB protocol color map messages from a VNC server, where incoming color indices are not properly validated. A malicious VNC server can exploit this flaw by sending crafted messages with out-of-range values, leading to an out-of-bounds write on the heap. This memory corruption can result in a denial of service (DoS) or potentially allow remote code execution (RCE) prior to authentication. This issue has been fixed in version 0.10.6.1.