Adobe Acrobat and Reader versions 2020.006.20042 and earlier, 2017.011.30166 and earlier, 2017.011.30166 and earlier, and 2015.006.30518 and earlier have an use-after-free vulnerability. Successful exploitation could lead to arbitrary code execution .
https://helpx.adobe.com/security/products/acrobat/apsb20-24.html