Adobe Acrobat and Reader 2018.011.20040 and earlier, 2017.011.30080 and earlier, and 2015.006.30418 and earlier versions have an Out-of-bounds read vulnerability. Successful exploitation could lead to information disclosure.
https://www.zerodayinitiative.com/advisories/ZDI-18-675/
https://helpx.adobe.com/security/products/acrobat/apsb18-21.html