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CVE-2021-39856

nvd nist
Published: Sep 29, 2021Modified: Jun 17, 2026

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6.5
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Exploitability: 2.8 / Impact: 3.6
Source: NVD

Description

Acrobat Reader DC ActiveX Control 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 obtain NTLMv2 credentials. Exploitation of this issue requires user interaction in that a victim must visit an attacker controlled web page.

Affected (8)

Adobe
4 products
Acrobat
Acrobat Reader
Acrobat Dc
Acrobat Reader Dc
Configuration A
2 vulnerable
Vulnerable SoftwareAffected Versions
Acrobat
17.011.30059 ≤ version ≤ 17.011.30199
Acrobat Reader
17.011.30059 ≤ version ≤ 17.011.30199
Configuration B
2 vulnerable
Vulnerable SoftwareAffected Versions
Acrobat
20.001.30005 ≤ version ≤ 20.004.30006
Acrobat Reader
20.001.30005 ≤ version ≤ 20.004.30006
Configuration C
2 vulnerable · 1 platform
Vulnerable SoftwareAffected Versions
Acrobat Dc
15.008.20082 ≤ version ≤ 21.005.20058
Acrobat Reader Dc
15.008.20082 ≤ version ≤ 21.005.20058
Running on/withPlatform Versions
Apple
Macos
All versions
Configuration D
2 vulnerable · 1 platform
Vulnerable SoftwareAffected Versions
Acrobat Dc
15.008.20082 ≤ version ≤ 21.005.20060
Acrobat Reader Dc
15.008.20082 ≤ version ≤ 21.005.20060
Running on/withPlatform Versions
Microsoft
Windows
All versions

Related CWEs

CWE-200
Exposure of Sensitive Information to an Unauthorized Actor
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

References (2)

Source: psirt@adobe.com
Release NotesVendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Release NotesVendor Advisory

Timeline

No history available yet.