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CVE-2026-3780— Foxit PDF Editor/Reader Installer Uncontrolled Search Path Privilege Escalation

Quick assessment

Affected
Foxit Software Inc. Foxit PDF Reader
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Foxit PDF Reader和Foxit PDF Editor都是中国福昕（Foxit）公司的产品。Foxit PDF Reader是一款PDF阅读器。Foxit PDF Editor是一款PDF编辑器。 Foxit PDF Reader和Foxit PDF Editor存在安全漏洞，该漏洞源于安装程序以提升的权限运行，但使用包含用户可写目录的不受信任搜索路径解析系统可执行文件和DLL，可能导致本地攻击者放置同名恶意二进制文件并使其被加载或执行，从而造成本地权限提升。

CVSS 7.3 · High EPSS 0.17% · P6
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I. Basic Information for CVE-2026-3780

Vulnerability Information
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Vulnerability Title
Foxit PDF Editor/Reader Installer Uncontrolled Search Path Privilege Escalation
Source: CVE Program / CVE List V5
Vulnerability Description
The application's installer runs with elevated privileges but resolves system executables and DLLs using untrusted search paths that can include user-writable directories, allowing a local attacker to place malicious binaries with the same names and have them loaded or executed instead of the legitimate system files, resulting in local privilege escalation.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不可信的搜索路径
Source: CVE Program / CVE List V5
Vulnerability Title
Foxit PDF Reader和Foxit PDF Editor 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Foxit PDF Reader和Foxit PDF Editor都是中国福昕（Foxit）公司的产品。Foxit PDF Reader是一款PDF阅读器。Foxit PDF Editor是一款PDF编辑器。 Foxit PDF Reader和Foxit PDF Editor存在安全漏洞，该漏洞源于安装程序以提升的权限运行，但使用包含用户可写目录的不受信任搜索路径解析系统可执行文件和DLL，可能导致本地攻击者放置同名恶意二进制文件并使其被加载或执行，从而造成本地权限提升。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Foxit Software Inc. Foxit PDF Reader Versions 2025.3 and earlier -
Foxit Software Inc. Foxit PDF Editor Versions 2025.3 and earlier -

II. Public POCs for CVE-2026-3780

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III. Intelligence Information for CVE-2026-3780

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Same Patch Batch · Foxit Software Inc. · 2026-04-01 · 8 CVEs total

CVE-2026-3775 7.8 HIGH Foxit PDF Editor/Reader Update Service Uncontrolled Search Path Element Local Privilege Es
CVE-2026-3779 7.8 HIGH Foxit PDF Editor/Reader List Box Calculate Array Use-After-Free Vulnerability
CVE-2026-4947 7.1 HIGH Insecure Direct Object Reference (IDOR) Leading to Signature Forgery in Foxit eSign
CVE-2026-3778 6.2 MEDIUM Stack exhaustion caused by cyclic references in Foxit PDF Editor/Reader
CVE-2026-3776 5.5 MEDIUM Null pointer dereference in Foxit PDF Editor/Reader when accessing stamp annotation
CVE-2026-3777 5.5 MEDIUM Use after free of view cache in Foxit PDF Editor/Reader
CVE-2026-3774 4.7 MEDIUM Self-Modifications Affecting Altered Printing and Redaction in Foxit PDF Editor

IV. Related Vulnerabilities

Same product: Foxit PDF Reader
Same vendor: Foxit Software Inc.
Same weakness: CWE-426

V. Comments for CVE-2026-3780

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