CVE-2021-21017
CVSS v3
8.8
HIGH
EPSS Score
90.6 %
exploit probability
CISA KEV
Yes
known exploited
Exploitation
—
SSVC status
Description
Acrobat Reader DC versions versions 2020.013.20074 (and earlier), 2020.001.30018 (and earlier) and 2017.011.30188 (and earlier) are affected by a heap-based buffer overflow 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.
CISA Known Exploited Vulnerability
- Date Added
- 2021-11-03
- Patch Due Date
- 2021-11-17
- Ransomware Use
- Unknown
Technical details
- Published
- 2021-02-11
Frequently asked questions
What is CVE-2021-21017?
Acrobat Reader DC versions versions 2020.013.20074 (and earlier), 2020.001.30018 (and earlier) and 2017.011.30188 (and earlier) are affected by a heap-based buffer overflow 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.
Is CVE-2021-21017 actively exploited?
Yes. CVE-2021-21017 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2021-11-17.
What is the CVSS score for CVE-2021-21017?
CVE-2021-21017 has a CVSS v3 base score of 8.8 (HIGH severity).
Is CVE-2021-21017 affecting your environment?
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