Security readout for executives and security teams
Plain-English summary
CVE-2018-9937 is a Foxit Reader vulnerability that can let an attacker run code when a user opens a malicious file or visits a malicious page. The business risk is endpoint compromise through document handling, but the provided sources do not show active exploitation or broad version impact.
Executive priority
Prioritize remediation where affected Foxit Reader installations exist on business endpoints. The issue enables code execution through user-driven document activity, but urgency is reduced if the affected build is absent and no exploitation evidence is present.
Technical view
The flaw affects Foxit Reader 9.0.0.29935. It occurs during parsing of subform elements, where insufficient validation of user-supplied data can cause type confusion, mapped to CWE-704. Successful exploitation can execute code in the current process context.
Likely exposure
Exposure is most likely on endpoints still running Foxit Reader 9.0.0.29935 and used to open PDFs or web-delivered document content from external sources.
Exploitation context
Sources describe remote attack potential with required user interaction: the target must open a malicious file or visit a malicious page. The bundle does not identify public exploit use, KEV listing, or confirmed active exploitation.
Researcher notes
Do not generalize beyond Foxit Reader 9.0.0.29935 from the provided bundle. The named root cause is subform element parsing leading to type confusion. Fix details are not included here, so validation should rely on Foxit guidance and local version evidence.
Mitigation direction
- Inventory endpoints for Foxit Reader 9.0.0.29935.
- Review Foxit security bulletins for the vendor-supported update or remediation path.
- Remove, upgrade, or isolate affected installations according to vendor guidance.
- Limit opening untrusted documents on affected systems until remediated.
Validation and detection
- Confirm whether Foxit Reader 9.0.0.29935 exists in endpoint software inventory.
- Validate remediated hosts no longer report the affected build.
- Check security controls flag externally sourced PDFs for affected users.
- Document exceptions and compensating controls for any remaining affected systems.
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-704: 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 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-2018-9937 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-18-321CVE 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.
Incorrect Type Conversion or Cast
Incorrect Type Conversion or Cast represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.