CVE-2026-57256
HIGH 7.8When 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.
Severe if exploited (CVSS 7.8), but no known exploitation and low modeled probability. Patch on a normal cadence.
Exploitation likelihood
0.1%chance of exploitation in 30 days · 2nd percentile
Impact if exploited
7.8CVSS 3.1 · HIGH
- ConfidentialityHigh
- IntegrityHigh
- AvailabilityHigh
What an attacker needs
- ⚠Access: Requires local access to the host
- ✓Privileges: No account or privileges required
- ⚠User interaction: A user must take an action (click / open a file)
- ✓Complexity: No special conditions — reliably repeatable
✓ lowers the bar for an attacker · ⚠ raises it
Proof of concept & exploit code
- github-search Search GitHub for public PoC repos
Test against your own equipment
curl -s https://vulnpedia.com/cve/CVE-2026-57256/poc.jsonMachine-readable PoC index for this CVE (for automation).Listed for defensive triage, patch verification, and authorized testing on systems you own. Machine-readable: /cve/CVE-2026-57256/poc.json
Affected
Vendors Foxit Software Inc. Foxit Apple Microsoft
Products Foxit Pdf Editor Foxit Pdf Reader Pdf Editor Pdf Reader Macos Windows
Weakness (CWE)
- CWE-416: Use after free
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Known Affected Software Configurations
| Vendor | Product | Version range |
|---|---|---|
| Foxit | Pdf Editor | ≤ 13.2.4.24048 |
| Foxit | Pdf Editor | ≥ 14.0.0.33046 and ≤ 14.0.4.33508 |
| Foxit | Pdf Editor | ≥ 2023.1.0.15510 and ≤ 2023.3.0.23028 |
| Foxit | Pdf Editor | ≥ 2024.1.0.23997 and ≤ 2024.4.1.27687 |
| Foxit | Pdf Editor | ≥ 2025.1.0.27937 and ≤ 2025.3.0.35737 |
| Foxit | Pdf Editor | ≥ 2026.1.0.36452 and ≤ 2026.1.1.36485 |
| Foxit | Pdf Reader | ≤ 2026.1.1.36485 |
All CVSS metrics
- HIGH 7.8 v3.1 · CNA Primary
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - HIGH 7.8 v3.1 · NVD Secondary
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H