Foxit PDF Reader < 2026.1.1 Multiple Vulnerabilities

high Nessus Plugin ID 310448

Synopsis

A PDF viewer installed on the remote Windows host is affected by multiple vulnerabilities

Description

According to its version, the Foxit PDF Reader application (previously named Foxit Reader) installed on the remote Windows host is prior to 2026.1.1. It is, therefore affected by multiple vulnerabilities:

- Document structural anomalies caused inconsistencies between page element relationships and internal index states. When scripts triggered document modifications, object reference validity was not properly maintained, leading to a crash when accessing an invalid pointer during page information queries.
(CVE-2026-5943)

- Insufficient parameter verification leads to the occurrence of format errors in files, which will trigger an unhandled std::invalid_argument exception, ultimately causing the program to terminate.
(CVE-2026-5937)

- Improper control flow management allows a crafted document action chain to cause modal dialog reentry on the main thread, resulting in UI freeze and denial of service. (CVE-2026-5938)

- A crafted XFA PDF can trigger a use-after-free condition during calculate event processing, causing the application to crash and resulting in an arbitrary code execution. (CVE-2026-5939)

- Calling a function that triggers a UI refresh after removing comments via a script may access an invalidated object, leading to program crashes. (CVE-2026-5940)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade to Foxit PDF Reader version 2026.1.1 or later

Plugin Details

Severity: High

ID: 310448

File Name: foxit_reader_2026_1_1.nasl

Version: 1.1

Type: Local

Agent: windows

Family: Windows

Published: 4/27/2026

Updated: 4/27/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2026-5943

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:foxitsoftware:foxit_reader

Required KB Items: SMB/Registry/Enumerated, installed_sw/Foxit Reader

Exploit Ease: No known exploits are available

Patch Publication Date: 4/27/2026

Vulnerability Publication Date: 4/27/2026

Reference Information

CVE: CVE-2026-5937, CVE-2026-5938, CVE-2026-5939, CVE-2026-5940, CVE-2026-5941, CVE-2026-5942, CVE-2026-5943

Detections

Analytics