Security readout for executives and security teams
Plain-English summary
Foxit PDF Reader and PDF Editor before 11.0.1 can mishandle a malformed PDF object table condition. The documented outcomes include application crash behavior and possible memory access outside intended bounds. Business urgency depends on whether users still run affected Foxit versions and routinely open external PDFs.
Executive priority
Address during normal vulnerability management unless affected versions are widespread among high-risk document-handling users. Escalate if legacy Foxit versions remain on internet-facing support, finance, legal, or customer intake workflows.
Technical view
The issue involves an array size derived from a PDF /Size entry being smaller than the maximum indirect object number. Foxit then attempts incorrect array access, leading to NULL pointer dereference, out-of-bounds read, or out-of-bounds write in affected Reader and Editor versions before 11.0.1.
Likely exposure
Organizations are exposed if endpoints still have Foxit PDF Reader or PDF Editor versions earlier than 11.0.1, especially where users open PDFs from email, web downloads, or external parties.
Exploitation context
The provided sources do not show CISA KEV listing, public active exploitation, exploit availability, or a CVSS score. Treat this as a potentially serious document-parsing memory safety issue, but do not claim active exploitation from the supplied evidence.
Researcher notes
Evidence is limited to the CVE description and Foxit bulletin reference. No CWE, CVSS, exploit status, or detailed affected platform matrix is provided in the source bundle. The core condition is inconsistent PDF object sizing leading to incorrect array access.
Mitigation direction
- Inventory Foxit PDF Reader and PDF Editor installations across managed endpoints.
- Update affected Foxit installations to 11.0.1 or later, following Foxit guidance.
- Prioritize users who open external PDFs or handle customer-supplied documents.
- Restrict untrusted PDF handling where updates cannot be completed promptly.
Validation and detection
- Confirm installed Foxit versions are not earlier than 11.0.1.
- Check software inventory for unmanaged or legacy Foxit installations.
- Verify patch deployment on high-risk user groups first.
- Review vendor security bulletin for any product-specific remediation notes.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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CVE-2021-38563 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://www.foxitsoftware.com/support/security-bulletins.phpCVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.