Buffer overflow in Adobe Acrobat
CVE-2021-39863
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.
Vulnerability class: Buffer Overflow
EPSS: 0.132 (96.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- psirt@adobe.com (x_refsource_MISC, Release Notes, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-39863?
- CVE-2021-39863 is a high-severity vulnerability in Adobe Acrobat, classified under Heap-based Buffer Overflow. CVSS score: 7.8/10. Published 2021-09-29.
- How severe is CVE-2021-39863?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2021-39863 known to be exploited?
- 13 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.