What is CVE-2021-38564?

CVE-2021-38564 is a critical-severity vulnerability in Foxitsoftware Pdf Editor, classified under Out-of-bounds Read. CVSS score: 9.1/10. Published 2021-08-11.

How severe is CVE-2021-38564?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Out-of-bounds Read in Foxitsoftware Pdf Editor

CVE-2021-38564

An issue was discovered in Foxit PDF Reader before 11.0.1 and PDF Editor before 11.0.1. It allows an out-of-bounds read via util.scand.

Vulnerability class: Buffer Overflow

Published 2021-08-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

EPSS exploit prediction

EPSS: 0.011 (64.0th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 64.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

www.foxitsoftware.com/support/security-bulletins.php (Vendor Advisory)

Frequently asked questions

What is CVE-2021-38564?: CVE-2021-38564 is a critical-severity vulnerability in Foxitsoftware Pdf Editor, classified under Out-of-bounds Read. CVSS score: 9.1/10. Published 2021-08-11.
How severe is CVE-2021-38564?: Critical severity. CVSS v3 base score is 9.1 out of 10.