CVE-2021-28550criticalunder attackCWE-416

CVE-2021-28550: critical vulnerability in Adobe Acrobat Reader

Adobe Acrobat Reader use after free vulnerability could lead to arbitrary code execution

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70Vexday Risk Score

Prioritize patching. It under exploitation confirmed by CISA.

ssvc Actcvss 9.6epss 52%
from disclosure to weapon
Published on NVDSep 2
CISA KEV+62d
Action required by CISAfederal deadline: 2021-11-17

Apply updates per vendor instructions.

In short

Adobe Acrobat Reader has a memory management flaw that allows attackers to run malicious code on your computer when you open a specially crafted PDF file. This happens because the application uses memory that has already been freed, leading to unpredictable behavior.

Technical detail

A use-after-free vulnerability in Acrobat Reader DC (versions 2021.001.20150, 2020.001.30020, 2017.011.30194 and earlier) allows unauthenticated remote code execution when a victim opens a malicious PDF. The attack vector requires user interaction and exploits memory safety issues in the application's heap management.

Summary generated and translated by AI from the official description.

The full analysis of this CVE is available in Portuguese →

Acrobat Reader DC versions versions 2021.001.20150 (and earlier), 2020.001.30020 (and earlier) and 2017.011.30194 (and earlier) are affected by a Use After Free vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Affected products
Adobe · Acrobat Reader
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