Lynx 2.8.5, and other versions before 2.8.6dev.15, allows remote attackers to execute arbitrary commands via (1) lynxcgi:, (2) lynxexec, and (3) lynxprog links, which are not properly restricted in the default configuration in some environments.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9712
https://exchange.xforce.ibmcloud.com/vulnerabilities/23119
http://www.vupen.com/english/advisories/2005/2394
http://www.securityfocus.com/bid/15395
http://www.securityfocus.com/archive/1/419763/100/0/threaded
http://www.redhat.com/support/errata/RHSA-2005-839.html
http://www.openpkg.org/security/OpenPKG-SA-2005.026-lynx.html
http://www.mandriva.com/security/advisories?name=MDKSA-2005:211
http://www.idefense.com/application/poi/display?id=338&type=vulnerabilities
http://www.gentoo.org/security/en/glsa/glsa-200511-09.xml
http://support.avaya.com/elmodocs2/security/ASA-2006-035.htm
http://securitytracker.com/id?1015195
http://securityreason.com/securityalert/173
http://secunia.com/advisories/18659
http://secunia.com/advisories/18376
http://secunia.com/advisories/18051
http://secunia.com/advisories/17757
http://secunia.com/advisories/17666
http://secunia.com/advisories/17576
http://secunia.com/advisories/17556
http://secunia.com/advisories/17546