Alfredo Ortega found a flaw in how Vinagre uses format strings. A remote attacker could exploit this vulnerability if they were able to trick a user into connecting to a malicious VNC server, or opening a specially crafted URI with Vinagre. With older versions of Vinagre, it was possible to execute arbitrary code with user privileges. In later versions, Vinagre would abort, leading to a denial of service. The updated packages have been patched to prevent this issue.