Buffer overflow in Adobe Acrobat
CVE-2021-39846
Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) are affected by a stack overflow vulnerability due to insecure handling of a crafted PDF file, potentially resulting in memory corruption in the context of the current user. Exploitation requires user interaction in that a victim must open a crafted PDF file in Acrobat Reader.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H.
EPSS exploit prediction
EPSS: 0.026 (84.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 84.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.026 · newest: 0.026 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- helpx.adobe.com/security/products/acrobat/apsb21-55.html (Release Notes, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-39846?
- CVE-2021-39846 is a medium-severity vulnerability in Adobe Acrobat, classified under Stack-based Buffer Overflow. CVSS score: 6.1/10. Published 2021-09-29.
- How severe is CVE-2021-39846?
- Medium severity. CVSS v3 base score is 6.1 out of 10.
- Is CVE-2021-39846 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.