Acrobat Reader DC versions 2020.012.20048 (and earlier), 2020.001.30005 (and earlier) and 2017.011.30175 (and earlier) are affected by a use-after-free vulnerability that could result in a memory address leak. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
https://www.zerodayinitiative.com/advisories/ZDI-20-1357/
https://helpx.adobe.com/security/products/acrobat/apsb20-67.html