Security readout for executives and security teams
Plain-English summary
CVE-2021-31464 affects Foxit Reader 10.1.3.37598. A malicious PDF or webpage could make the application read memory it should not access, exposing limited sensitive information. The published record does not show active exploitation or KEV listing.
Executive priority
Treat as a low-priority patch hygiene issue unless Foxit Reader 10.1.3.37598 is widely deployed or heavily exposed to untrusted PDFs.
Technical view
The flaw is a CWE-125 out-of-bounds read in Foxit Reader handling of U3D objects embedded in PDF files. It results from insufficient validation of user-supplied data and can read past an allocated object. ZDI notes it could be combined with other vulnerabilities for code execution in the current process.
Likely exposure
Exposure is limited to systems running Foxit Reader 10.1.3.37598, especially where users open external PDFs or Foxit handles PDFs from browsers or email clients.
Exploitation context
User interaction is required: the target must visit a malicious page or open a malicious file. The provided sources do not report active exploitation.
Researcher notes
Evidence is specific to Foxit Reader 10.1.3.37598 and U3D PDF object parsing. The source bundle does not provide a fixed version, proof of exploitation, or standalone code execution path.
Mitigation direction
- Identify and prioritize endpoints running Foxit Reader 10.1.3.37598.
- Check Foxit security bulletins for the vendor-supported fixed version or guidance.
- Update or replace affected Foxit Reader installations per vendor guidance.
- Reduce user exposure to untrusted PDFs from email and web sources.
Validation and detection
- Inventory installed Foxit Reader versions across managed endpoints.
- Confirm whether Foxit Reader is the default PDF handler.
- Review email and web controls for externally sourced PDF delivery.
- Check vendor advisory records for CVE-2021-31464 remediation details.
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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CWE-125: Exact CWE lookup
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Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-31464 mapping review
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Open ATT&CK lookup- Severity
- Low
- CVSS
- 3.3 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
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 vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N1.81.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
3.3LowVector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.foxitsoftware.com/support/security-bulletins.phpCVE reference · x_refsource_MISC
- https://www.zerodayinitiative.com/advisories/ZDI-21-553/CVE 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.
Out-of-bounds Read
Out-of-bounds Read represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.