Medium severity · published Sep 29, 2021
CVE-2021-39856
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…
6.5
CVSS
2.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.4% · higher than 84% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AC
Acrobat · Adobe
17.011.30059 through 17.011.30199; 20.001.30005 through 20.004.30006 · source: NVD
AD
Acrobat DC · Adobe
15.008.20082 through 21.005.20058; 15.008.20082 through 21.005.20060 · source: NVD
AR
Acrobat Reader · Adobe
17.011.30059 through 17.011.30199; 20.001.30005 through 20.004.30006 · source: NVD
AR
Acrobat Reader DC · Adobe
15.008.20082 through 21.005.20058; 15.008.20082 through 21.005.20060 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-39856
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-39856
Release Notes
https://helpx.adobe.com/security/products/acrobat/apsb21-55.html
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