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CVE-2026-5943— Foxit PDF Editor/Reader AcroForm Annotation Use-After-Free Remote Code Execution Vulnerability

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 Editor和Foxit PDF Reader存在资源管理错误漏洞，该漏洞源于文档结构异常导致页面元素关系与内部索引状态不一致，当脚本触发文档修改时对象引用有效性未正确维护，可能导致在页面信息查询时访问无效指针导致崩溃。

CVSS 7.8 · High EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1211 · Exploitation for Stealth
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I. Basic Information for CVE-2026-5943

Vulnerability Information
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Vulnerability Title
Foxit PDF Editor/Reader AcroForm Annotation Use-After-Free Remote Code Execution Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/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 Editor和Foxit PDF Reader存在资源管理错误漏洞，该漏洞源于文档结构异常导致页面元素关系与内部索引状态不一致，当脚本触发文档修改时对象引用有效性未正确维护，可能导致在页面信息查询时访问无效指针导致崩溃。
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-2026-5943

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III. Intelligence Information for CVE-2026-5943

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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-2026-5940 7.8 HIGH Foxit PDF Editor/Reader Annotation Use-After-Free Remote Code Execution Vulnerability
CVE-2026-5939 5.5 MEDIUM UAF in Foxit PDF Editor/Reader via XFA calculate event
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-2026-5943

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