Medium severity · published Apr 1, 2021
CVE-2021-28546
Acrobat Reader DC versions versions 2020.013.20074 (and earlier), 2020.001.30018 (and earlier) and 2017.011.30188 (and earlier) are missing support for an integrity check
6.5
CVSS
1.5%
EPSS
No
On KEV
Description
Acrobat Reader DC versions versions 2020.013.20074 (and earlier), 2020.001.30018 (and earlier) and 2017.011.30188 (and earlier) are missing support for an integrity check. An unauthenticated attacker could leverage this vulnerability to modify content in a certified PDF without invalidating the certification. Exploitation of this issue requires user interaction in that a victim must open the tampered file.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.5% · higher than 74% 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 17.011.30188; 20.001.30005 through 20.001.30018 · source: NVD
AD
Acrobat DC · Adobe
15.008.20082 through 20.013.20074 · source: NVD
AR
Acrobat Reader · Adobe
17.011.30059 through 17.011.30188; 20.001.30005 through 20.001.30018 · source: NVD
AR
Acrobat Reader DC · Adobe
15.008.20082 through 20.013.20074 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-28546
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-28546
Vendor Advisory
https://helpx.adobe.com/security/products/acrobat/apsb21-09.html
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