What is CVE-2026-57256?
When the application opens a PDF and executes JavaScript, it performs abnormal operations on the list box field, and this operation is repeated after the form is reset. During this process, the application failed to adequately verify the validity of the form objects and their internal dictionary pointers, resulting in accessing internal members of invalid or improperly initialized fields. This led to an illegal pointer read, ultimately causing the application to crash.
The record classifies CVE-2026-57256 under weakness class CWE-416. Its CVSS v3 base vector states that the flaw requires local access to the host, needs no prior authentication, needs a user to take an action first, and has high impact on confidentiality, integrity, availability. 2 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 94 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 7.8 — HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - EPSS (FIRST)
- 0.1% probability of exploitation in the next 30 days, higher than 6.2% of all scored CVEs
- CISA KEV
- Not listed in the CISA Known Exploited Vulnerabilities catalog
- Threadlinqs priority
- 6.2/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- Published
- 2026-07-08, last modified 2026-07-09
Is CVE-2026-57256 being exploited?
Weaponised exploit code for CVE-2026-57256 is publicly available. 1 public proof-of-concept repository is tracked for this identifier. It currently carries a trending score of 21 in the Threadlinqs vulnerability feed.
- trickest/cve (trickest)
Affected products and versions
- Foxit Software Inc.: Foxit PDF Editor, Foxit PDF Reader
How to fix CVE-2026-57256
Vendor advisory: https://www.foxit.com/support/security-bulletins.html. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.
Threat activity tracking CVE-2026-57256
1 tracked threat in the Threadlinqs corpus references CVE-2026-57256, either in the campaign’s CVE list or as an indicator on the campaign record.
Sources
Enriched from CVE.org, NVD, FIRST EPSS, public proof-of-concept repositories. Last verified by Threadlinqs on . This product uses the NVD API but is not endorsed or certified by the NVD.