CVE-2021-38563
9.8 · CRITICALOverview
CVE-2021-38563 is a critical-severity vulnerability affecting foxit pdf_reader. It was published on August 11, 2021 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
An issue was discovered in Foxit PDF Reader before 11.0.1 and PDF Editor before 11.0.1. It mishandles situations in which an array size (derived from a /Size entry) is smaller than the maximum indirect object number, and thus there is an attempted incorrect array access (leading to a NULL pointer dereference, or out-of-bounds read or write).
Remediation
Check the references section for vendor advisories and patches from foxit. Update pdf_reader to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| foxit | pdf_reader | 0 | Affected |
| foxitsoftware | pdf_editor | 0 | Affected |
Frequently Asked Questions
What is CVE-2021-38563?
CVE-2021-38563 is a critical-severity vulnerability affecting foxit pdf_reader. It was published on August 11, 2021 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
How severe is CVE-2021-38563?
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-38563?
Check the references section for vendor advisories and patches from foxit. Update pdf_reader to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-38563?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-38563 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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