Security readout for executives and security teams
Plain-English summary
CVE-2018-9946 affects Foxit Reader 9.0.0.29935. A victim must open a malicious file or visit a malicious page. The flaw can expose sensitive information and may help an attacker combine this bug with other issues to run code in the reader process.
Executive priority
Treat as a targeted endpoint hygiene issue, not an emergency based on the provided evidence. Prioritize remediation where Foxit Reader is used for external documents or high-risk business workflows.
Technical view
The reported flaw is in Foxit Reader handling of the setTimeOut method. The issue is described as missing validation that an object exists before operations are performed on it, mapped to CWE-416. ZDI tracked it as ZDI-CAN-5471 / ZDI-18-330.
Likely exposure
Exposure is likely limited to endpoints running Foxit Reader 9.0.0.29935, especially where users receive external PDFs or browse untrusted content associated with PDF handling.
Exploitation context
The source bundle requires user interaction and does not show CISA KEV listing or confirmed active exploitation. The advisory states the bug can support code execution only when chained with other vulnerabilities.
Researcher notes
Evidence is limited to the CVE description, Foxit bulletin reference, and ZDI advisory reference. No CVSS vector, fixed version, proof of exploitation, or detailed patch notes are included in the supplied bundle.
Mitigation direction
- Inventory endpoints for Foxit Reader 9.0.0.29935.
- Check Foxit security guidance for the fixed or supported version.
- Update or replace affected Foxit Reader installations per vendor guidance.
- Restrict opening untrusted PDFs until affected systems are remediated.
Validation and detection
- Confirm installed Foxit Reader versions across managed endpoints.
- Review exposure for users handling external PDFs or web-delivered documents.
- Verify vendor remediation guidance has been applied.
- Monitor for alerts involving suspicious PDF files or Foxit Reader crashes.
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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-416: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2018-9946 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_CONFIRM
- https://zerodayinitiative.com/advisories/ZDI-18-330CVE 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.
Use After Free
Use After Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.