The Load method in the Chart component of Office Web Components (OWC) 9 and 10 generates an exception when a specified file does not exist, which allows remote attackers to determine the existence of local files.
https://exchange.xforce.ibmcloud.com/vulnerabilities/8784
https://euvd.enisa.europa.eu/vulnerability/EUVD-2002-1322
http://www.securityfocus.com/bid/4454
http://www.kb.cert.org/vuls/id/156123