Vulnerability identifier: #VU56544

Vulnerability risk: High

CVSSv3.1:

CVE-ID: CVE-2021-39837

CWE-ID:

Exploitation vector: Network

Exploit availability:

Vulnerable software:
Adobe Acrobat
Client/Desktop applications / Office applications
Adobe Reader
Client/Desktop applications / Office applications

Vendor: Adobe

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a use-after-free error when processing PDF files. A remote attacker can trick the victim to open a specially crafted PDF file, trigger a use-after-free error and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Adobe Acrobat: 21.001.20135 - 21.005.20148, 20.001.30020 - 20.013.20074, 17.008.30051 - 17.011.30199

Adobe Reader: 2020.001.30020 - 2020.013.20074, 2017.008.30051 - 2017.011.30199

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Fixed software versions

CPE

• cpe:2.3:a:adobe:adobe_acrobat:21.005.20060:*:*:*:*:*:*:*

External links
http://helpx.adobe.com/security/products/acrobat/apsb21-55.html

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Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?