Security readout for executives and security teams
Plain-English summary
Foxit Reader and PhantomPDF before 10.1.4 have a path validation flaw in CombineFiles that allows arbitrary file writes. For executives, the concern is endpoint integrity: vulnerable PDF software may let an attacker place or overwrite files if the vulnerable workflow is reached.
Executive priority
Treat this as a targeted endpoint hygiene issue, not an emergency based on current evidence. Prioritize patching exposed desktop fleets, especially teams processing external PDF files.
Technical view
CVE-2021-38573 is an arbitrary file write issue caused by insufficient validation of a CombineFiles pathname in Foxit Reader and PhantomPDF before 10.1.4. The provided sources do not include CVSS, CWE, exploit prerequisites, or detailed attack conditions.
Likely exposure
Exposure is likely limited to endpoints running Foxit Reader or PhantomPDF versions earlier than 10.1.4. The source bundle does not identify server products, cloud services, or specific operating systems.
Exploitation context
The source bundle does not show CISA KEV listing or cited active exploitation. It also does not provide proof-of-concept details, exploit maturity, or required user interaction, so exploitation likelihood remains uncertain.
Researcher notes
The public bundle is sparse: no CVSS vector, CWE, attack scenario, or affected platform matrix is provided. Analysis should avoid assumptions beyond arbitrary file write through unvalidated CombineFiles pathname before 10.1.4.
Mitigation direction
- Inventory Foxit Reader and PhantomPDF installations across managed endpoints.
- Upgrade affected installations to version 10.1.4 or later, following Foxit guidance.
- Review Foxit security bulletins for product-specific update instructions.
- Prioritize users handling untrusted PDFs or combining files frequently.
Validation and detection
- Confirm installed Foxit Reader and PhantomPDF versions are 10.1.4 or later.
- Check software inventory for legacy PhantomPDF or Reader deployments.
- Review endpoint telemetry for unusual file writes by Foxit applications.
- Document any systems that cannot be upgraded and track vendor 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.
CVE-2021-38573 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_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.