What is CVE-2021-33792?

CVE-2021-33792 is a high-severity vulnerability in Foxitsoftware Foxit Reader, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2021-07-09.

How severe is CVE-2021-33792?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Foxitsoftware Foxit Reader

CVE-2021-33792

Foxit Reader before 10.1.4 and PhantomPDF before 10.1.4 have an out-of-bounds write via a crafted /Size key in the Trailer dictionary.

Vulnerability class: Buffer Overflow

Published 2021-07-09 · last modified 2026-06-17.

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.

EPSS exploit prediction

EPSS: 0.021 (81.0th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 81st percentile — 81.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.021 · newest: 0.021 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

www.foxitsoftware.com/support/security-bulletins.html (Not Applicable, Vendor Advisory)

Frequently asked questions

What is CVE-2021-33792?: CVE-2021-33792 is a high-severity vulnerability in Foxitsoftware Foxit Reader, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2021-07-09.
How severe is CVE-2021-33792?: High severity. CVSS v3 base score is 7.8 out of 10.