CVE-2018-3940 is a high-severity use-after-free vulnerability in the JavaScript engine of Foxit PDF Reader and PhantomPDF, affecting version 9.1.0.5096 on Windows. An attacker can exploit this by crafting a malicious PDF document, which, when opened by a user, triggers the reuse of a freed memory object. This allows for potential arbitrary code execution with high impact on confidentiality, integrity, and availability. While the CVSS score is 8.8 (HIGH), there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or inclusion in CISA's KEV catalog, despite some community discussion and media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 9.2.0.9297CPE matchmatch criteria | cpe:2.3:a:foxitsoftware:phantompdf:*:*:*:*:*:*:*:* | ||
<= 9.2.0.9297CPE matchmatch criteria | cpe:2.3:a:foxitsoftware:reader:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.
Remediation records are not available for this CVE.