Security readout for executives and security teams
Plain-English summary
CVE-2018-9953 is a remote code execution issue in Foxit Reader 9.0.1.1049. A user must open a malicious file or visit a malicious page. If exploited, attacker code can run as the current user, making phishing and document delivery the main business concern.
Executive priority
Treat this as a high-priority workstation risk if legacy Foxit Reader is present. The issue enables code execution through user-driven document interaction, but urgency depends on whether version 9.0.1.1049 remains deployed.
Technical view
The flaw is in the XFA resolveNodes method for Button elements. The source describes missing validation before operating on an object, mapped to CWE-416. Successful exploitation can execute arbitrary code in the current Foxit Reader process after user interaction.
Likely exposure
Exposure is most likely on endpoints still running Foxit Reader 9.0.1.1049, especially where users handle external PDFs or browser-delivered documents. The source bundle does not identify other affected Foxit products or versions.
Exploitation context
The provided sources state exploitation requires the target to open a malicious file or visit a malicious page. KEV status is false, and no cited source in the bundle confirms active exploitation.
Researcher notes
Evidence is specific but incomplete: the bundle names Foxit Reader 9.0.1.1049, XFA Button resolveNodes, CWE-416, and ZDI-CAN-5528, but provides no CVSS vector, confirmed exploit activity, or exact fixed version.
Mitigation direction
- Inventory endpoints for Foxit Reader 9.0.1.1049.
- Check Foxit security bulletins for vendor-approved update guidance.
- Prioritize remediation for users handling external documents.
- Restrict use of the affected reader until remediated.
- Apply least privilege and endpoint controls around document readers.
Validation and detection
- Confirm installed Foxit Reader versions across managed endpoints.
- Verify vulnerable version 9.0.1.1049 is removed or updated.
- Review vulnerability scanner results for this CVE.
- Check software deployment records for legacy Foxit packages.
- Monitor endpoint telemetry for suspicious Foxit Reader crashes or child processes.
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 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-2018-9953 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://zerodayinitiative.com/advisories/ZDI-18-337CVE reference · x_refsource_MISC
- https://www.foxitsoftware.com/support/security-bulletins.phpCVE reference · x_refsource_CONFIRM
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.