Security readout for executives and security teams
Plain-English summary
Foxit Reader 9.0.1.1049 contains a memory-safety flaw that can let an attacker run code as the user. Exploitation requires the user to visit a malicious page or open a malicious file, so exposed risk is mainly on endpoints where this Reader version handles untrusted content.
Executive priority
Treat as a high-priority endpoint exposure if Foxit Reader 9.0.1.1049 is present, especially for users handling external files. No active exploitation evidence is provided here, but code execution impact warrants prompt verification and remediation.
Technical view
The flaw is in parsing the rect Field attribute. Sources describe 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 on Foxit Reader 9.0.1.1049.
Likely exposure
Organizations are exposed where Foxit Reader 9.0.1.1049 is installed and used to open PDFs or related content from email, web, or external sources. The provided bundle names only Foxit Reader 9.0.1.1049 as affected.
Exploitation context
The source bundle supports remote code execution with required user interaction. It does not show CISA KEV listing or any cited evidence of active exploitation in the wild.
Researcher notes
Evidence is specific but limited: affected version, vulnerable parser area, user-interaction requirement, and RCE impact are provided. CVSS, exact patched version, and active exploitation evidence are not included in the bundle.
Mitigation direction
- Check Foxit's security bulletins for the vendor-supported fix or upgrade path.
- Upgrade or remove Foxit Reader 9.0.1.1049 where found.
- Limit opening untrusted PDF files and unknown web content.
- Prefer hardened PDF handling and endpoint protections for high-risk users.
Validation and detection
- Inventory endpoints for Foxit Reader 9.0.1.1049.
- Confirm whether Foxit Reader is the default PDF handler.
- Review email and web controls for untrusted PDF delivery risk.
- 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-2018-9961 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-18-345CVE 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.