Security readout for executives and security teams
Plain-English summary
This CVE affects older Foxit desktop PDF products. A flaw in JavaScript handling can cause a use-after-free condition that may let an attacker run code. The business risk is highest where staff open external or unsolicited PDFs using affected Foxit versions.
Executive priority
Treat this as a high-priority endpoint remediation item if Foxit PDF software is deployed. Arbitrary code execution in a document viewer can create phishing and malware risk, but urgency should be guided by actual installed versions because active exploitation is not confirmed in the supplied evidence.
Technical view
Foxit PDF Reader before 11.1, PDF Editor before 11.1, and PhantomPDF before 10.1.6 are reported vulnerable. The issue is a use-after-free caused by mishandled JavaScript, with arbitrary code execution as the stated impact. No CVSS, CWE, or KEV exploitation signal is provided in the bundle.
Likely exposure
Exposure is likely on Windows or desktop endpoints running the affected Foxit versions, especially users who routinely open PDFs from email, web downloads, clients, or suppliers. The bundle does not identify server-side exposure or affected mobile products.
Exploitation context
The provided sources do not confirm active exploitation. The issue is not marked KEV in the source bundle. The plausible attack context is document-based code execution through affected Foxit PDF software, but no exploit details are provided here.
Researcher notes
Evidence is limited to the CVE record and Foxit bulletin reference. The bundle does not provide CVSS, CWE, detailed root cause, exploit maturity, or a named workaround beyond version thresholds. Validate affected builds directly rather than relying on product family presence alone.
Mitigation direction
- Inventory Foxit PDF Reader, PDF Editor, and PhantomPDF installations and versions.
- Upgrade Reader and Editor to 11.1 or later, per vendor guidance.
- Upgrade PhantomPDF to 10.1.6 or later, per vendor guidance.
- Review Foxit security bulletins for product-specific instructions.
- Reduce exposure to untrusted PDFs until affected installs are updated.
Validation and detection
- Check endpoint software inventory for Foxit versions below the fixed releases.
- Confirm upgraded Foxit installations report Reader or Editor 11.1 or later.
- Confirm PhantomPDF installations report 10.1.6 or later.
- Review email and endpoint controls for untrusted PDF handling.
- Track remediation exceptions for users who must retain older versions.
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-2021-41783 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.