CVE-2021-39839CWE-416

Adobe Acrobat Reader DC AcroForm getItemAt Use-After-Free Remote Code Execution Vulnerability

High · published September 29, 2021

Patch now

High probability of exploitation

CVSS calls it high at 7.8. It sits in the 99.3th percentile for exploit probability.

CVSS v3.0
7.8
EPSS
65%
Percentile
99.3
In the wild
Unconfirmed
What it is

Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) are affected by a use-after-free vulnerability in the processing of the AcroForm getItem action that could result in 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.

The record
Technical detail
CVSS v3.0
7.8 · HIGH
Vector
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.65249 · 99.3th percentile
Weakness
CWE-416 · Use After Free
Published
2021-09-29T15:37Z
EPSS history
Timeline
  • 29 SEP 15:37Z
    Adobe Acrobat Reader DC AcroForm getItemAt Use-After-Free Remote Code Execution Vulnerability
    cvelistv5