tftp.c in libslirp 4.1.0, as used in QEMU 4.2.0, does not prevent ..\ directory traversal on Windows.

tcp_emu in tcp_subr.c in libslirp 4.1.0, as used in QEMU 4.2.0, mismanages memory, as demonstrated by IRC DCC commands in EMU_IRC. This can cause a heap-based buffer overflow or other out-of-bounds access which can lead to a DoS or potential execute arbitrary code.

In eLux RP 5.x before 5.5.1000 LTSR and 5.6.x before 5.6.2 CR when classic desktop mode is used, it is possible to start applications other than defined, even if the user does not have permissions to change application definitions.