Use after free in Foxit PDF Reader
Priority MEDIUM 42CWE-416Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-416 and the CVSS impact.
Summary
An exploitable use-after-free vulnerability exists in the JavaScript engine of Foxit Software's PDF Reader, version 9.1.0.5096. A specially crafted PDF document can trigger a previously freed object in memory to be reused. An attacker needs to trick the user to open the malicious file to trigger.
Why it matters now
EPSS 0.02114 81st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Foxit Software Inc. | Foxit PDF Reader | 9.1.0.5096 | — | No fix listed | CNA |
- Foxit PDF Reader VendorFoxit Software Inc. Affected 9.1.0.5096 Fixed in — No fix listed CNA
CPE configurations NVD · 3
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:foxitsoftware:phantompdf:*:*:*:*:*:*:*:* | up to 9.2.0.9297 | Vulnerable | Foxitsoftware |
| cpe:2.3:a:foxitsoftware:reader:*:*:*:*:*:*:*:* | up to 9.2.0.9297 | Vulnerable | Foxitsoftware |
| cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Microsoft |
- cpe:2.3:a:foxitsoftware:phantompdf:*:*:*:*:*:*:*:* Versions up to 9.2.0.9297 Vulnerable ·Foxitsoftware
- cpe:2.3:a:foxitsoftware:reader:*:*:*:*:*:*:*:* Versions up to 9.2.0.9297 Vulnerable ·Foxitsoftware
- cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2018-3940
- 2026-10-03 Alias added: GHSA-mmqm-wj2w-f634
References
More Foxit Software Inc. vulnerabilities
- TI-2011-04633 Foxit PDF Reader < 4.3.1.0218 JavaScript File Write CVSS 4.0HIGH 8.4
- TI-2016-06851 Out-of-bounds read in Foxit Reader CVSS 3.0MEDIUM 6.8
- TI-2018-02932 Use after free in Foxit PDF Reader CVSS 3.1HIGH 7.8
- TI-2018-02965 Use after free in Foxit PDF Reader CVSS 3.1HIGH 8.8
- TI-2018-02964 Use after free in Foxit PDF Reader CVSS 3.1HIGH 8.8
- TI-2018-02962 Use after free in Foxit PDF Reader CVSS 3.1HIGH 8.8
Sources
- CVE-2018-3940 · CVE Program
- CVE-2018-3940 · NVD
- FIRST EPSS
- GHSA-mmqm-wj2w-f634 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences