Main Vulnerability Database Vulnerabilities #VU53125

Use-after-free in Adobe Reader and Adobe Acrobat - CVE-2021-28550

Published: May 11, 2021

Vulnerability identifier: #VU53125

CSH Severity: Critical

CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-28550

CWE-ID: CWE-416

Exploitation vector: Remote access

Exploit availability: The vulnerability is being exploited in the wild

Vulnerability details

The vulnerability allows a remote attacker to compromise vulnerable system.

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

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Note, the vulnerability is being actively exploited in the wild.

Affected software

Adobe Reader
Adobe Acrobat

How to mitigate CVE-2021-28550

Install updates from vendor's website.

Adobe Reader - addressed in versions 17.011.30196, 20.001.30025, 21.001.20155
Adobe Acrobat - addressed in versions 17.011.30196, 20.001.30025, 21.001.20155

External References

https://helpx.adobe.com/security/products/acrobat/apsb21-29.html

Related Security Bulletins