What is TIFF.CVE-2015-5097[Exp!]

I just opened a web site forum and click on a thread, an avast message came up indicated a word document from my lap top had transferred to the virus chest with virus TIFF.CVE-2015-5097[Exp!]. I tried to restore the document and open in word but it indicated an error in word. I clicked on another thread and it did the same thing transferring another document to the virus chest. I am not sure what is going on?

https://forum.avast.com/index.php?topic=173935.msg1235274#msg1235274

If things got put in the virus chest, it means your system doesn’t have the latests security updates.

CVE-2015-5097 [Exp] = exploit http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-5097

Integer overflow in Adobe Reader and Acrobat 10.x before 10.1.15 and 11.x before 11.0.12, Acrobat and Acrobat Reader DC Classic before 2015.006.30060, and Acrobat and Acrobat Reader DC Continuous before 2015.008.20082 on Windows and OS X allows attackers to execute arbitrary code via unspecified vectors, a different vulnerability than CVE-2015-5108 and CVE-2015-5109.

Adobe Security Bulletin https://helpx.adobe.com/security/products/reader/apsb15-15.html

Thank you for all your help!