CVE-2021-28634: Adobe Acrobat DC

High severity, CVSS 8.2. EPSS: 2.2% chance of exploitation in the next 30 days.

Acrobat Reader DC versions 2021.005.20054 (and earlier), 2020.004.30005 (and earlier) and 2017.011.30197 (and earlier) are affected by an Improper Neutralization of Special Elements used in an OS Command. An authenticated attacker could leverage this vulnerability to achieve arbitrary code execution on the host machine in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Affected products

• Adobe Acrobat DC: from 15.008.20082, up to and including 21.005.20054; from 17.011.30059, up to and including 17.011.30197; from 20.001.30005, up to and including 20.004.30005
• Adobe Acrobat Reader DC: from 15.008.20082, up to and including 21.005.20054; from 17.011.30059, up to and including 17.011.30197; from 20.001.30005, up to and including 20.004.30005

Published 2021-08-20. Last modified 2026-06-17.