Security readout for executives and security teams
Plain-English summary
CVE-2018-9963 is an information disclosure flaw in Foxit Reader 9.0.1.1049. A user must open a malicious file or visit a malicious page. By itself, the source describes sensitive information disclosure; it also notes attackers could combine it with other vulnerabilities for code execution.
Executive priority
Treat this as a moderate workstation risk. It requires user interaction, but document-reader flaws are useful in phishing chains. Prioritize remediation where Foxit Reader is used by staff handling external files.
Technical view
The flaw is a CWE-125 out-of-bounds read in JPEG2000 image parsing. Foxit Reader 9.0.1.1049 lacks proper validation of user-supplied data, allowing a read past an allocated object. The public description attributes the report to ZDI-CAN-5549.
Likely exposure
Exposure is limited to systems running Foxit Reader 9.0.1.1049, especially endpoints that open PDFs or browser-delivered documents from external sources. The bundle does not identify other Foxit products or versions as affected.
Exploitation context
The CVE is not listed as CISA KEV in the provided bundle. The cited description requires user interaction: opening a malicious file or visiting a malicious page. No source in the bundle confirms active exploitation.
Researcher notes
The public evidence identifies an out-of-bounds read in JPEG2000 parsing, not a standalone remote code execution path. The CVE states code execution may be possible only when chained with other vulnerabilities. Patch details are not included in the bundle.
Mitigation direction
- Inventory endpoints for Foxit Reader and flag version 9.0.1.1049.
- Follow Foxit security bulletin guidance and move affected systems to a supported fixed release.
- Reduce exposure to untrusted PDFs and web-delivered files until upgraded.
- Prioritize controls for email attachments and downloaded documents on high-risk workstations.
Validation and detection
- Confirm installed Foxit Reader versions through endpoint inventory or software management records.
- Check whether Foxit Reader 9.0.1.1049 remains on user workstations or shared images.
- Review EDR and email telemetry for suspicious Foxit Reader document-opening activity.
- Verify remediation against Foxit’s security bulletin rather than assuming later versions are fixed.
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
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CWE-125: Exact CWE lookup
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Open ATT&CK lookupCVE-2018-9963 mapping review
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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-18-347CVE 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.