Security readout for executives and security teams
Plain-English summary
Foxit Reader 9.0.0.29935 has a file-parsing flaw that could let an attacker run code when a user opens a malicious file or visits a malicious page. The main business concern is legacy desktop exposure and phishing-delivered documents, not confirmed internet-wide exploitation.
Executive priority
Treat this as a high-priority legacy software cleanup item where Foxit Reader 9.0.0.29935 remains installed. Urgency is lower if inventories prove the affected version is absent.
Technical view
The flaw is a CWE-787 out-of-bounds write in parsing U3D Bone Weight Modifier structures. Improper validation of user-supplied data can write past an allocated structure and allow code execution in the current Foxit Reader process. ZDI tracked it as ZDI-CAN-5423 and ZDI-18-401.
Likely exposure
Exposure appears limited to installations of Foxit Reader 9.0.0.29935. Organizations with unmanaged workstations, stale gold images, or users who open external PDF-like content should prioritize inventory validation.
Exploitation context
The source states remote attackers need user interaction: the target must visit a malicious page or open a malicious file. The bundle does not cite KEV listing or public active exploitation evidence.
Researcher notes
Evidence names one affected version and one parsing component. No CVSS vector, patch details, exploit maturity, or broader product range is provided in the bundle, so avoid extrapolating beyond Foxit Reader 9.0.0.29935.
Mitigation direction
- Inventory endpoints for Foxit Reader 9.0.0.29935.
- Review Foxit security bulletins for fixed-version guidance.
- Update or remove vulnerable Foxit Reader installations per vendor guidance.
- Limit opening untrusted documents from email, web, and chat sources.
- Use least-privilege user accounts where Foxit Reader remains deployed.
Validation and detection
- Confirm whether Foxit Reader 9.0.0.29935 exists on managed endpoints.
- Check software deployment records for successful Foxit updates or removals.
- Review endpoint alerts involving suspicious documents opened by Foxit Reader.
- Validate exceptions are documented and time-bound.
- Confirm user-facing document handlers are current and supported.
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-787: 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-2018-10491 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-18-401CVE 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 Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.