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

EPSS: 0.026 (83.7th percentile) — read the EPSS interpretation.

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.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

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.