Security readout for executives and security teams
Plain-English summary
CVE-2018-9950 is a Foxit Reader PDF parsing flaw that can expose sensitive memory when a user opens a malicious PDF or visits a malicious page. The sources name Foxit Reader 9.0.0.29935 as affected. It is not listed as KEV-exploited, but it could support a broader attack chain.
Executive priority
Treat this as a targeted endpoint hygiene issue, not an internet-wide emergency. Prioritize remediation where Foxit Reader 9.0.0.29935 remains installed on user workstations that handle external PDFs.
Technical view
The flaw is CWE-125, a read past the end of an allocated object during PDF document parsing. ZDI tracked it as ZDI-CAN-5413/ZDI-18-334. The disclosed impact is sensitive information disclosure, with possible use alongside other vulnerabilities for code execution in the current process context.
Likely exposure
Exposure is limited to endpoints running Foxit Reader 9.0.0.29935, especially users who receive PDFs or browse untrusted content. The bundle does not identify server-side exposure, other Foxit products, or broader version ranges.
Exploitation context
User interaction is required: the target must open a malicious file or visit a malicious page. The provided sources and KEV flag do not show known active exploitation. The main risk is information disclosure and potential chaining with separate vulnerabilities.
Researcher notes
The bundle does not provide CVSS, a fixed version, proof of exploitation, or detailed vulnerable parser internals. Avoid assuming broader Foxit impact. Validate by version inventory and vendor bulletin review, then assess exploitability in the context of local document-handling controls.
Mitigation direction
- Identify and update or remove Foxit Reader 9.0.0.29935 installations.
- Check Foxit security bulletins for the vendor-supported fixed version.
- Reduce handling of untrusted PDFs on vulnerable endpoints.
- Use email and web controls to block suspicious PDF delivery paths.
- Prioritize replacement where the application is unsupported or unmanaged.
Validation and detection
- Inventory endpoint software versions for Foxit Reader 9.0.0.29935.
- Confirm whether affected endpoints still process PDFs from email or browsers.
- Review vendor security bulletins for remediation status and fixed builds.
- Check EDR, mail, and proxy telemetry for suspicious PDF events.
- Document compensating controls where immediate upgrade is not possible.
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-125: 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-2018-9950 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-18-334CVE 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.