CVE-2021-39851: Adobe Acrobat Reader DC Null Pointer Dereference Could Lead To Application Denial-of-Service
First published: Wed 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.
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 iOS and macOS | ||
| Microsoft Windows | ||
| Adobe Acrobat | >=15.008.20082<=21.005.20058 | |
| Adobe Acrobat Reader | >=15.008.20082<=21.005.20058 | |
| Adobe Acrobat | >=15.008.20082<=21.005.20060 | |
| Adobe Acrobat Reader | >=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 severity of CVE-2021-39851?
The severity of CVE-2021-39851 is classified as medium due to its potential to cause denial-of-service.
How do I fix CVE-2021-39851?
To fix CVE-2021-39851, update Adobe Acrobat Reader DC to the latest version that is not vulnerable.
Which versions of Adobe Acrobat are affected by CVE-2021-39851?
Affected versions include Acrobat Reader DC versions up to 21.005.20060, as well as earlier versions of 2020 and 2017.
Can CVE-2021-39851 be exploited remotely?
Yes, CVE-2021-39851 can be exploited remotely by an unauthenticated attacker.
What type of vulnerability is CVE-2021-39851?
CVE-2021-39851 is a Null pointer dereference vulnerability.
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- agent/first-publish-date
- agent/event
- agent/source
- agent/softwarecombine
- agent/tags
- collector/nvd-index
- agent/software-canonical-lookup-request
- vendor/adobe
- canonical/adobe acrobat reader
- version/adobe acrobat reader/20.001.30005
- version/adobe acrobat reader/20.004.30006
- vendor/apple
- canonical/apple ios and macos
- vendor/microsoft
- canonical/microsoft windows
- canonical/adobe acrobat
- version/adobe acrobat/15.008.20082
- version/adobe acrobat/21.005.20058
- version/adobe acrobat reader/15.008.20082
- version/adobe acrobat reader/21.005.20058
- version/adobe acrobat/21.005.20060
- version/adobe acrobat reader/21.005.20060
- version/adobe acrobat reader/17.011.30059
- version/adobe acrobat reader/17.011.30199