CVE-2021-39863 in the critical feed json
Adobe Acrobat Reader DC Heap-based Buffer Overflow Vulnerability Could Lead To Arbitrary Code Execution
published 2021-09-29 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-26220
- cvss
- 7.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 13.2%
- EPSS 13.2% chance of exploitation in 30 days, percentile 96%
- public exploits
- 0
- none known
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.
Exploit prediction
13.19% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 6.8 | AV:N/AC:M/Au:N/C:P/I:P/A:P |
Affected products
- Adobe Acrobat Reader
Classification
- Weakness
-
- CWE-122 Heap-based Buffer Overflow
References
-
helpx.adobe.com
/security/products/acrobat/apsb21-55.html
release-notes, vendor-advisory
Sources
- CVE List CVE-2021-39863
- NVD CVE-2021-39863
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