CVE-2021-44713: 
Adobe Acrobat Reader Continuous vulnerability analysis and mitigation

Adobe Acrobat Reader DC version 21.007.20099 (and earlier), 20.004.30017 (and earlier) and 17.011.30204 (and earlier) are affected by a use-after-free vulnerability in the processing of Format event actions. The vulnerability was assigned CVE-2021-44713 and was disclosed on January 14, 2022 (NVD Database, CVE Mitre).

The vulnerability is classified as a use-after-free (CWE-416) issue that occurs during the processing of Format event actions. It has received a CVSS 3.1 Base Score of 5.5 (Medium) with the vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H. Under CVSS 2.0, it scores 4.3 (Medium) with the vector (AV:N/AC:M/Au:N/C:N/I:N/A:P) (NVD Database).

When successfully exploited, this vulnerability could result in application denial of service. The impact is primarily focused on the availability of the application, with no direct impact on confidentiality or integrity (NVD Database).

Exploitation of this vulnerability requires user interaction, specifically requiring a victim to open a malicious file. This requirement somewhat mitigates the ease of exploitation (NVD Database).

Adobe has addressed this vulnerability in their security update. Users should update to versions newer than 21.007.20099 for the continuous release, 20.004.30017 for the classic 2020 release, or 17.011.30204 for the classic 2017 release (Adobe Advisory).