Adobe Acrobat and Reader versions 2018.011.20058 and earlier, 2017.011.30099 and earlier, and 2015.006.30448 and earlier have an out-of-bounds write vulnerability. Successful exploitation could lead to arbitrary code execution.
https://research.checkpoint.com/2018/50-adobe-cves-in-50-days/
https://helpx.adobe.com/security/products/acrobat/apsb18-34.html