CVE-2021-39857 MEDIUM

CVE-2021-39857: Adobe Acrobat Reader DC Information Disclosure via ActiveX LoadFile

Vendor Adobe
Product Acrobat Reader
Weakness CWE-200 · Info exposure
Published September 29, 2021
Last update April 23, 2025

CVSS base score

4.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality Low
Integrity None

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

What the vulnerability does

01Description

Adobe Acrobat Reader DC add-on for Internet Explorer versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) are affected by an Information Disclosure vulnerability. An unauthenticated attacker could leverage this vulnerability to check for existence of local files. Exploitation of this issue requires user interaction in that a victim must visit an attacker controlled web page.

Key dates

02Disclosure timeline

September 29, 2021 CVE published
April 23, 2025 Record updated