CVE-2021-39843CWE-787

Adobe Acrobat Reader XObject Out-of-Bound Write Vulnerability

High · published September 29, 2021

Patch now

High probability of exploitation

CVSS calls it high at 7.8. It sits in the 99.5th percentile for exploit probability.

CVSS v3.1

7.8

EPSS

77%

Percentile

99.5

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 an out-of-bounds write vulnerability 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 v3.1: 7.8 · HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0: Not supplied
EPSS: 0.76678 · 99.5th percentile
Weakness: CWE-787 · Out-of-bounds Write
Published: 2021-09-29T15:38Z

EPSS history

Timeline

29 SEP 15:38Z
Adobe Acrobat Reader XObject Out-of-Bound Write Vulnerability
cvelistv5