CVE-2021-39859: Adobe Acrobat

Medium severity, CVSS 5.5. EPSS: 0.4% 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 Use After Free vulnerability that could lead to disclosure of sensitive memory. An attacker could leverage this vulnerability to bypass mitigations such as ASLR. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Affected products

• Adobe Acrobat: from 17.011.30180, before 17.011.30202 (fixed in 17.011.30202); from 20.001.30005, before 20.004.30015 (fixed in 20.004.30015)
• Adobe Acrobat DC: from 15.007.20033, up to and including 21.005.20060; from 15.007.20033, up to and including 21.005.20058
• Adobe Acrobat Reader: from 17.011.30180, before 17.011.30202 (fixed in 17.011.30202); from 20.001.30005, before 20.004.30015 (fixed in 20.004.30015)
• Adobe Acrobat Reader DC: from 15.007.20033, up to and including 21.005.20060; from 15.007.20033, up to and including 21.005.20058

Published 2023-09-06. Last modified 2026-06-17.