CVE-2021-21017
Description
Acrobat Reader DC versions versions 2020.013.20074 (and earlier), 2020.001.30018 (and earlier) and 2017.011.30188 (and earlier) are affected by a heap-based buffer overflow vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve 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.
Summary dbcve.org
Adobe Acrobat Reader DC contains a heap-based buffer overflow vulnerability in multiple older versions. An attacker can craft a malicious PDF file that, when opened by a victim, triggers the buffer overflow, allowing arbitrary code execution in the context of the current user. The attack requires user interaction (opening the malicious file).
Mitigation
Update Adobe Acrobat Reader DC to a version newer than 2020.013.20074, 2020.001.30018, or 2017.011.30188 (depending on the track). Alternatively, disable or restrict the ability to open untrusted PDF files and train users not to open suspicious attachments.