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CVE-2026-5939— UAF in Foxit PDF Editor/Reader via XFA calculate event

Quick assessment

Affected
Foxit Software Inc. Foxit PDF Editor
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存在资源管理错误漏洞，该漏洞源于特制XFA PDF在计算事件处理中触发释放后重用，可能导致应用程序崩溃并执行任意代码。

CVSS 5.5 · Medium EPSS 0.16% · P5
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I. Basic Information for CVE-2026-5939

Vulnerability Information
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Vulnerability Title
UAF in Foxit PDF Editor/Reader via XFA calculate event
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5
Vulnerability Title
Foxit PDF Reader和Foxit PDF Editor 资源管理错误漏洞
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存在资源管理错误漏洞，该漏洞源于特制XFA PDF在计算事件处理中触发释放后重用，可能导致应用程序崩溃并执行任意代码。
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 Editor Versions 2026.1 and earlier -
Foxit Software Inc. Foxit PDF Reader Versions 2026.1 and earlier -

II. Public POCs for CVE-2026-5939

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III. Intelligence Information for CVE-2026-5939

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Same Patch Batch · Foxit Software Inc. · 2026-04-27 · 7 CVEs total

CVE-2026-5941 7.8 HIGH Foxit PDF Editor/Reader AcroForm Signature Remote Code Execution Vulnerability
CVE-2026-5943 7.8 HIGH Foxit PDF Editor/Reader AcroForm Annotation Use-After-Free Remote Code Execution Vulnerabi
CVE-2026-5940 7.8 HIGH Foxit PDF Editor/Reader Annotation Use-After-Free Remote Code Execution Vulnerability
CVE-2026-5938 5.5 MEDIUM Foxit PDF Editor/Reader Infinite Loop Denial-of-Service Vulnerability
CVE-2026-5937 5.5 MEDIUM Foxit PDF Editor/Reader's insufficient parameter validation leads to denial-of-service vul
CVE-2026-5942 5.5 MEDIUM Foxit PDF Editor/Reader AcroForm Signature Use-After-Free Vulnerability

IV. Related Vulnerabilities

Same product: Foxit PDF Editor
Same vendor: Foxit Software Inc.
Same weakness: CWE-416

V. Comments for CVE-2026-5939

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