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 in the processing of Format event actions that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1156
https://helpx.adobe.com/security/products/acrobat/apsb20-67.html