xrdb.c in xrdb before 1.0.9 in X.Org X11R7.6 and earlier allows remote attackers to execute arbitrary commands via shell metacharacters in a hostname obtained from a (1) DHCP or (2) XDMCP message.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.094
EPSS Ranking 92.3%