Adobe Reader and Acrobat 9.x before 9.3.2, and 8.x before 8.2.2 on Windows and Mac OS X, do not properly handle fonts, which allows attackers to execute arbitrary code via unspecified vectors.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7420
http://www.vupen.com/english/advisories/2010/0873
http://www.us-cert.gov/cas/techalerts/TA10-103C.html
http://www.securityfocus.com/bid/39329
http://www.adobe.com/support/security/bulletins/apsb10-09.html