CVE-2021-39852: Adobe Acrobat Reader DC Null Pointer Dereference Could Lead To Application Denial-of-Service

Published Sep 29, 2021
·
Updated

Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) are affected by a Null pointer dereference vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve an application denial-of-service in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Affected Software

24 affected components
Adobe Acrobat>=17.011.30059<=17.011.30199
Adobe Acrobat Reader>=17.011.30059<=17.011.30199
Apple macOS
Microsoft Windows
Adobe Acrobat>=20.001.30005<=20.004.30006
Adobe Acrobat Reader>=20.001.30005<=20.004.30006
Adobe Acrobat DC>=15.008.20082<=21.005.20058
Adobe Acrobat Reader DC>=15.008.20082<=21.005.20058
Adobe Acrobat DC>=15.008.20082<=21.005.20060
Adobe Acrobat Reader DC>=15.008.20082<=21.005.20060
All of the following
Any of the following
Adobe Acrobat>=17.011.30059<=17.011.30199
Adobe Acrobat Reader>=17.011.30059<=17.011.30199
Any of the following
Apple macOS
Microsoft Windows
All of the following
Any of the following
Adobe Acrobat>=20.001.30005<=20.004.30006
Adobe Acrobat Reader>=20.001.30005<=20.004.30006
Any of the following
Apple macOS
Microsoft Windows
All of the following
Any of the following
Adobe Acrobat DC>=15.008.20082<=21.005.20058
Adobe Acrobat Reader DC>=15.008.20082<=21.005.20058
Apple macOS
All of the following
Any of the following
Adobe Acrobat DC>=15.008.20082<=21.005.20060
Adobe Acrobat Reader DC>=15.008.20082<=21.005.20060
Microsoft Windows

Event History

Sep 29, 2021
CVE Published
via MITRE·03:38 PM
Data Sourced
via MITRE·03:38 PM
DescriptionSeverityWeakness
Data Sourced
via NVD·04:15 PM
DescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

1

What is CVE-2021-39852?

CVE-2021-39852 is a vulnerability in Adobe Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier), and 2017.011.30199 (and earlier) that allows an attacker to achieve application denial-of-service.

2

How does CVE-2021-39852 affect Adobe Acrobat and Adobe Acrobat Reader?

CVE-2021-39852 affects Adobe Acrobat and Adobe Acrobat Reader versions as mentioned in the vulnerability.

3

How severe is CVE-2021-39852?

CVE-2021-39852 has a severity rating of 5.5 (medium).

4

How can an attacker leverage CVE-2021-39852?

An unauthenticated attacker could leverage CVE-2021-39852 to achieve application denial-of-service.

5

Where can I find more information about CVE-2021-39852?

You can find more information about CVE-2021-39852 at the following link: [Adobe Security Bulletin](https://helpx.adobe.com/security/products/acrobat/apsb21-55.html).

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203