CVE-2021-39863
Adobe Acrobat Reader DC Heap-based Buffer Overflow Vulnerability Could Lead To Arbitrary Code Execution
- Published
- Sep 29, 2021
- Updated
- Sep 17, 2024
- Assigning CNA
- adobe
- Evidence observed
- Aug 8, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HModerate · next 30 days
- Percentile
- 96.3%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) are affected by a Buffer Overflow vulnerability when parsing a specially crafted PDF file. 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.
Sources
1- CVE-2021-39863Exploit
Exploit for Adobe Acrobat Reader DC heap buffer overflow (CVE-2021-39863) with ASLR/DEP bypass, including root cause analysis and reversed vulnerable function.
Responsible use
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