CVE-2021-39850: Adobe Acrobat Reader DC Null Pointer Dereference Could Lead To Application Denial-of-Service
First published: Tue Sep 14 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.
Credit: psirt@adobe.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Adobe Acrobat Reader | >=20.001.30005<=20.004.30006 | |
| Adobe Acrobat Reader | >=20.001.30005<=20.004.30006 | |
| Apple macOS | ||
| Microsoft Windows | ||
| 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 | |
| Adobe Acrobat Reader | >=17.011.30059<=17.011.30199 | |
| Adobe Acrobat Reader | >=17.011.30059<=17.011.30199 |
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Frequently Asked Questions
What is the vulnerability ID of this issue?
The vulnerability ID is CVE-2021-39850.
What is the severity level of CVE-2021-39850?
The severity level of CVE-2021-39850 is medium.
Which software versions are affected by CVE-2021-39850?
Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier), and 2017.011.30199 (and earlier) are affected by CVE-2021-39850.
How can an attacker exploit CVE-2021-39850?
An unauthenticated attacker could exploit CVE-2021-39850 to achieve an application denial-of-service in the context of the affected software.
Where can I find more information about CVE-2021-39850?
You can find more information about CVE-2021-39850 at the following link: [Adobe Security Bulletin APSB21-55](https://helpx.adobe.com/security/products/acrobat/apsb21-55.html).
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- version/adobe acrobat reader/20.004.30006
- vendor/apple
- canonical/apple macos
- vendor/microsoft
- canonical/microsoft windows
- canonical/adobe acrobat dc
- version/adobe acrobat dc/15.008.20082
- version/adobe acrobat dc/21.005.20058
- canonical/adobe acrobat reader dc
- version/adobe acrobat reader dc/15.008.20082
- version/adobe acrobat reader dc/21.005.20058
- version/adobe acrobat dc/21.005.20060
- version/adobe acrobat reader dc/21.005.20060
- version/adobe acrobat reader/17.011.30059
- version/adobe acrobat reader/17.011.30199