Multiple format string vulnerabilities in elogd.c in ELOG 2.6.2 and earlier allow remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via (1) an entry with an attachment whose name contains format string specifiers (el_submit function), and possibly other vectors in the (2) receive_config, (3) show_rss_feed, (4) show_elog_list, (5) show_logbook_node, and (6) server_loop functions.