Threats Tagged 'cve-2026-41521'

A heap-based buffer overflow vulnerability exists in neutrinolabs xrdp versions 0.10.6 and prior when operating in vnc-any mode. The flaw arises from missing bounds checks on color map messages from a VNC server, allowing crafted out-of-range values to cause out-of-bounds heap writes. This can lead to denial of service or remote code execution before authentication. The issue is fixed in version 0.10.6.1.

xrdp is an open source RDP server. Versions 0.10.6 and prior contain an integer overflow vulnerability when processing screen update messages within the vnc-any connection mode. A malicious remote VNC server can send crafted image dimensions that cause an integer overflow during memory buffer size calculation, resulting in an undersized allocation. Subsequent processing of the incoming image data using the original oversized parameters leads to an out-of-bounds read. An unauthenticated remote attacker could exploit this flaw to disclose sensitive information from the heap memory or cause a denial of service (DoS) via a process crash. This issue has been fixed in version 0.10.6.1.