CVE-2018-3940

Name: CVE-2018-3940
Creator: NVD / NIST
Published: 2018-10-08T16:29:02.553+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 2.11%

Last modified Jun 17, 2026

CVE-2018-3940 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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. EPSS estimates a 2.11% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

2.11%

79.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-416

Affected Software

Vendor	Product	Versions
Foxitsoftware	Phantompdf	<= 9.2.0.9297
Foxitsoftware	Reader	<= 9.2.0.9297

References

http://www.securitytracker.com/id/1041769Third Party Advisory, VDB Entry
https://talosintelligence.com/vulnerability_reports/TALOS-2018-0607Exploit, Third Party Advisory
https://www.foxitsoftware.com/support/security-bulletins.phpVendor Advisory
http://www.securitytracker.com/id/1041769Third Party Advisory, VDB Entry
https://talosintelligence.com/vulnerability_reports/TALOS-2018-0607Exploit, Third Party Advisory

Timeline

Published: Oct 8, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-3940?

How severe is CVE-2018-3940?

CVE-2018-3940 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 2.11% probability of exploitation in the next 30 days.

How do I fix CVE-2018-3940?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-3940?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST