An issue was discovered in Adobe Acrobat Reader 2018.009.20050 and earlier versions, 2017.011.30070 and earlier versions, 2015.006.30394 and earlier versions. The vulnerability is caused by the computation that writes data past the end of the intended buffer; the computation is part of the image conversion module that handless TIFF data. An attacker can potentially leverage the vulnerability to corrupt sensitive data or execute arbitrary code.
https://www.zerodayinitiative.com/advisories/ZDI-18-209/
https://helpx.adobe.com/security/products/acrobat/apsb18-02.html