Security readout for executives and security teams
Plain-English summary
This issue affects older Foxit Reader and PhantomPDF versions before 10.1.4. A maliciously crafted PDF could trigger memory corruption when the application parses the PDF trailer. The source bundle does not provide CVSS, confirmed impact beyond out-of-bounds write, or evidence of active exploitation.
Executive priority
Treat as a routine endpoint remediation item unless vulnerable Foxit versions are widely deployed or used with external PDFs. Prioritize patching affected desktops and document-handling workflows.
Technical view
CVE-2021-33792 is an out-of-bounds write in Foxit Reader and PhantomPDF before 10.1.4, triggered by a crafted /Size key in a PDF Trailer dictionary. The available sources identify the vulnerable version boundary but do not include detailed exploitability, CWE, or CVSS data.
Likely exposure
Exposure is most likely on endpoints where Foxit Reader or PhantomPDF before 10.1.4 remains installed and users open PDFs from email, web downloads, or shared repositories.
Exploitation context
The bundle does not show KEV listing or active exploitation evidence. Risk depends on whether users can open untrusted PDFs with vulnerable Foxit software.
Researcher notes
Evidence is limited to the CVE description and Foxit reference. No CVSS, CWE, exploit status, or deeper technical advisory details are included in the source bundle.
Mitigation direction
- Upgrade Foxit Reader and PhantomPDF to version 10.1.4 or later.
- Check Foxit security bulletins for current vendor guidance.
- Remove vulnerable Foxit versions where upgrading is not possible.
- Limit opening untrusted PDFs on vulnerable endpoints until remediated.
Validation and detection
- Inventory endpoints for Foxit Reader and PhantomPDF installations.
- Verify installed versions are 10.1.4 or later.
- Confirm software management tools report successful remediation.
- Review exposure for users handling external or unsolicited PDFs.
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-2021-33792 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.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.