CVE-2026-55639

xrdp is an open source RDP server. Versions 0.10.6 and prior contain a vulnerability concerning the parsing of Client Security Data within the Client MCS Connect Initial PDU with GCC Conference Create Request during the connection sequence. During the initial capability and security negotiation...

PT-2020-13830 · Simon Tatham +1 · Putty +1

Name of the Vulnerable Software and Affected Versions: PuTTY versions 0.68 through 0.73 Description: The issue allows man-in-the-middle attackers to target initial connection attempts where no host key for the server has been cached by the client, due to an Observable Discrepancy leading to an...

Qemu: qemu-nbd crashes due to undefined I/O coroutine

An assertion-failure flaw was found in the Network Block Device NBD server's initial connection negotiation, where the I/O coroutine was undefined. This could crash the qemu-nbd server if a client sent unexpected data during connection negotiation. A remote user or process could use this flaw to...

PT-2017-3734 · Qemu +1 · Qemu +2

Name of the Vulnerable Software and Affected Versions: Qemu versions prior to 2.10.1 Qemu-NBD affected versions not specified Description: The issue is related to errors during connection establishment in the Qemu-NBD hardware emulator server. It can be exploited by a remote attacker to cause a...