Security readout for executives and security teams
Plain-English summary
CVE-2018-9955 is a Foxit Reader flaw that can let an attacker run code if a user opens a malicious file or visits a malicious page. The bundle names Foxit Reader 9.0.1.1049 as affected. This is a user-driven desktop risk, not evidence of automatic network compromise.
Executive priority
Treat this as a high-priority endpoint remediation item where Foxit Reader 9.0.1.1049 is present. Business urgency is highest for teams that routinely open external documents, because exploitation depends on convincing a user to open attacker-controlled content.
Technical view
The flaw is in the XFA resolveNode method for Button elements. The issue is described as missing validation that an object exists before operations are performed on it, mapped to CWE-416. Successful exploitation can execute code in the current process context. The record cites ZDI-CAN-5531 and ZDI-18-339.
Likely exposure
Exposure is most likely on endpoints running Foxit Reader 9.0.1.1049, especially where users open untrusted PDFs or browse pages that can trigger Foxit-handled content. The bundle does not name other Foxit products or versions.
Exploitation context
User interaction is required: the target must visit a malicious page or open a malicious file. The provided bundle does not show CISA KEV listing or other cited evidence of active exploitation.
Researcher notes
Evidence supports arbitrary code execution in Foxit Reader 9.0.1.1049 through XFA Button resolveNode object validation failure. Patch details, CVSS metrics, and affected-version breadth are not provided in the bundle, so validation should stay tightly scoped to the named version and vendor bulletin.
Mitigation direction
- Inventory endpoints for Foxit Reader 9.0.1.1049.
- Check Foxit security bulletins for the vendor-approved fix or upgrade path.
- Prioritize remediation on systems handling external or unsolicited documents.
- Limit use of affected Foxit Reader until vendor guidance is applied.
Validation and detection
- Confirm installed Foxit Reader versions on managed endpoints.
- Check whether any systems still report version 9.0.1.1049.
- Review document-handling workflows for exposure to untrusted files.
- Verify remediation against Foxit's published security guidance.
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-2018-9955 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-18-339CVE 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.