CVE-2021-39845: Adobe Acrobat

Medium severity, CVSS 6.1. EPSS: 2.6% chance of exploitation in the next 30 days.

Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) are affected by a stack overflow vulnerability due to insecure handling of a crafted PDF file, potentially resulting in memory corruption in the context of the current user. Exploitation requires user interaction in that a victim must open a crafted PDF file in Acrobat Reader.

Affected products

• Adobe Acrobat: from 20.001.30005, up to and including 20.004.30006; from 17.011.30059, up to and including 17.011.30199
• Adobe Acrobat DC: from 15.008.20082, up to and including 21.005.20058; from 15.008.20082, up to and including 21.005.20060
• Adobe Acrobat Reader: from 20.001.30005, up to and including 20.004.30006; from 17.011.30059, up to and including 17.011.30199
• Adobe Acrobat Reader DC: from 15.008.20082, up to and including 21.005.20058; from 15.008.20082, up to and including 21.005.20060

Published 2021-09-29. Last modified 2026-06-17.