high
7.8
CWE
787
Advisory Published
Updated

CVE-2021-21086: Adobe Reader CoolType Arbitrary Stack Manipulation

First published: Thu Sep 02 2021(Updated: )

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 Write vulnerability in the CoolType library. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Credit: psirt@adobe.com

Affected SoftwareAffected VersionHow to fix
Adobe Acrobat Reader>=17.011.30056<=17.011.30188
Adobe Acrobat Reader>=20.001.30005<=20.001.30018
Adobe Acrobat Reader DC>=20.006.20042<=20.013.20074
Adobe Acrobat Reader Notification Manager>=17.011.30059<=17.011.30188
Adobe Acrobat Reader Notification Manager>=20.001.30005<=20.001.300183
Adobe Acrobat Reader>=20.006.20042<=20.013.20074
macOS
Microsoft Windows Operating System

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2021-21086?

    CVE-2021-21086 is rated as important due to its potential exploitation by an unauthenticated attacker.

  • How do I fix CVE-2021-21086?

    To fix CVE-2021-21086, you should update Adobe Acrobat and Acrobat Reader to the latest versions.

  • Which versions of Adobe Acrobat are affected by CVE-2021-21086?

    CVE-2021-21086 affects Acrobat Reader DC versions 2020.013.20074 and earlier, along with other specified older versions.

  • Can CVE-2021-21086 be exploited remotely?

    Yes, CVE-2021-21086 can be exploited remotely by an unauthenticated attacker.

  • What type of vulnerability is CVE-2021-21086?

    CVE-2021-21086 is classified as an Out-of-bounds Write vulnerability in the CoolType library.

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