CVE-2021-21034: Adobe Acrobat

Medium severity, CVSS 4.3. EPSS: 2.6% chance of exploitation in the next 30 days.

Acrobat Reader DC versions versions 2020.013.20074 (and earlier), 2020.001.30018 (and earlier) and 2017.011.30188 (and earlier) are affected by an Out-of-bounds Read vulnerability. An unauthenticated attacker could leverage this vulnerability to locally elevate privileges 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: from 17.0, up to and including 17.011.30188; from 20.0, up to and including 20.001.30018
• Adobe Acrobat DC: up to and including 20.013.20074
• Adobe Acrobat Reader: from 17.0, up to and including 17.011.30188; from 20.0, up to and including 20.001.300183
• Adobe Acrobat Reader DC: up to and including 20.013.20074

Published 2021-02-11. Last modified 2026-06-17.