CVE-2021-39857: Adobe Acrobat Reader DC Information Disclosure via ActiveX LoadFile
First published: Wed Sep 29 2021(Updated: )
Adobe Acrobat Reader DC add-on for Internet Explorer versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) are affected by an Information Disclosure vulnerability. An unauthenticated attacker could leverage this vulnerability to check for existence of local files. Exploitation of this issue requires user interaction in that a victim must visit an attacker controlled web page.
Credit: psirt@adobe.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Adobe Acrobat Reader | >=17.011.30059<=17.011.30199 | |
| Adobe Acrobat Reader Notification Manager | >=17.011.30059<=17.011.30199 | |
| macOS | ||
| Microsoft Windows Operating System | ||
| Adobe Acrobat Reader | >=20.001.30005<=20.004.30006 | |
| Adobe Acrobat Reader Notification Manager | >=20.001.30005<=20.004.30006 | |
| Adobe Acrobat Reader DC | >=15.008.20082<=21.005.20058 | |
| Adobe Acrobat Reader | >=15.008.20082<=21.005.20058 | |
| Adobe Acrobat Reader DC | >=15.008.20082<=21.005.20060 | |
| Adobe Acrobat Reader | >=15.008.20082<=21.005.20060 |
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Frequently Asked Questions
What is the severity of CVE-2021-39857?
CVE-2021-39857 is classified as an Information Disclosure vulnerability.
How do I fix CVE-2021-39857?
To mitigate CVE-2021-39857, upgrade to the latest version of Adobe Acrobat Reader DC or Adobe Acrobat.
Which versions are affected by CVE-2021-39857?
CVE-2021-39857 affects Adobe Acrobat Reader DC versions 2021.005.20060 and earlier, 2020.004.30006 and earlier, and 2017.011.30199 and earlier.
Can an authenticated user exploit CVE-2021-39857?
CVE-2021-39857 can be exploited by an unauthenticated attacker.
What type of vulnerability is CVE-2021-39857?
CVE-2021-39857 is an Information Disclosure vulnerability that allows unauthorized information to be checked.
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