CVE-2021-28545: Adobe Acrobat

High severity, CVSS 8.1. EPSS: 2.3% 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 missing support for an integrity check. An unauthenticated attacker would have the ability to completely manipulate data in a certified PDF without invalidating the original certification. Exploitation of this issue requires user interaction in that a victim must open the tampered file.

Affected products

• Adobe Acrobat: from 17.011.30059, up to and including 17.011.30188; from 20.001.30005, up to and including 20.001.30018
• Adobe Acrobat DC: from 15.008.20082, up to and including 20.013.20074
• Adobe Acrobat Reader: from 17.011.30059, up to and including 17.011.30188; from 20.001.30005, up to and including 20.001.30018
• Adobe Acrobat Reader DC: from 15.008.20082, up to and including 20.013.20074

Published 2021-04-01. Last modified 2026-06-17.