Security readout for executives and security teams
Plain-English summary
This flaw affects older Foxit desktop PDF products. A malicious PDF using JavaScript could cause memory misuse and allow arbitrary code execution in the context of the user opening it. The sources do not provide a CVSS score or confirm active exploitation.
Executive priority
Treat this as a high-priority endpoint patching issue where Foxit PDF products are deployed. The business risk is code execution from document handling, but urgency should be calibrated because the provided sources do not confirm active exploitation.
Technical view
CVE-2021-41785 is a use-after-free issue caused by mishandled JavaScript in Foxit PDF Reader, PDF Editor, and PhantomPDF. The stated impact is arbitrary code execution. Affected versions are PDF Reader before 11.1, PDF Editor before 11.1, and PhantomPDF before 10.1.6.
Likely exposure
Exposure is most likely on endpoints with Foxit PDF Reader below 11.1, Foxit PDF Editor below 11.1, or PhantomPDF below 10.1.6. The bundle does not identify server-side products or cloud services as affected.
Exploitation context
The CVE record describes attacker-triggered arbitrary code execution through JavaScript mishandling. The bundle does not include exploit details, in-the-wild exploitation evidence, or CISA KEV listing, so active exploitation is not established here.
Researcher notes
The public bundle is sparse: no CVSS vector, CWE, detailed advisory text, or exploit status is included. The strongest evidence is the CVE description naming use-after-free, JavaScript mishandling, arbitrary code execution, and affected version thresholds.
Mitigation direction
- Upgrade Foxit PDF Reader to version 11.1 or later.
- Upgrade Foxit PDF Editor to version 11.1 or later.
- Upgrade PhantomPDF to version 10.1.6 or later.
- Check Foxit security bulletins for product-specific guidance.
- Prioritize endpoints that frequently open external PDFs.
Validation and detection
- Inventory installed Foxit PDF product names and versions.
- Confirm PDF Reader and PDF Editor are at least 11.1.
- Confirm PhantomPDF is at least 10.1.6.
- Review endpoint software management records for remaining legacy installs.
- Check Foxit advisories for any superseding update 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.
Execution 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-2021-41785 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.foxit.com/support/security-bulletins.htmlCVE 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.