VULNERABILITY INTELLIGENCE

CVE-2018-3939

CVSS score8.8 HIGH

EPSS probability2.35%

CISA KEVNot currently listed

Published2018-08-01

Last modified2026-06-17

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

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, resulting in arbitrary code execution. An attacker needs to trick the user to open the malicious file to trigger this vulnerability. If the browser plugin extension is enabled, visiting a malicious site can also trigger the vulnerability.

Weakness classification

CWE-416: Use After Free

Primary references

talos-cna@cisco.com — Exploit, Technical Description, Third Party Advisory
nvd@nist.gov — Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 — Exploit, Technical Description, Third Party Advisory