High severity · published Sep 2, 2021
CVE-2021-28550
Adobe Acrobat Reader use after free vulnerability could lead to arbitrary code execution
In wildKEV
8.8
CVSS
51.9%
EPSS
Yes
On KEV
Description
Acrobat Reader DC versions versions 2021.001.20150 (and earlier), 2020.001.30020 (and earlier) and 2017.011.30194 (and earlier) are affected by a Use After Free vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve 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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)51.9% · higher than 99% of CVEs
Exploited in the wildYes
CISA KEVListed Nov 3, 2021
Federal remediation dueNov 17, 2021
Ransomware campaign useNot known
Affected products
Which versions
AR
Acrobat Reader · Adobe
through 2020.001.30020; through 2021.001.20150; through 2017.011.30194; through None · source: vendor, NVD
AC
Acrobat · Adobe
17.011.30059 through 17.011.30194; 20.001.30005 through 20.001.30020 · source: NVD
AD
Acrobat DC · Adobe
15.008.20082 through 21.001.20150; 15.008.20082 through 21.001.20149 · source: NVD
AR
Acrobat Reader DC · Adobe
15.008.20082 through 21.001.20150; 15.008.20082 through 21.001.20149 · source: NVD
AA
Acrobat and Reader · Adobe
All versions, or not specified · source: KEV
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-28550
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-28550
CISA KEV catalogue
https://www.cisa.gov/known-exploited-vulnerabilities-catalog
helpx.adobe.com
https://helpx.adobe.com/security/products/acrobat/apsb21-29.html
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