CVE-2026-3776— Null pointer dereference in Foxit PDF Editor/Reader when accessing stamp annotation
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I. Basic Information for CVE-2026-3776
Vulnerability Information
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Vulnerability Title
Null pointer dereference in Foxit PDF Editor/Reader when accessing stamp annotation
Source: NVD (National Vulnerability Database)
Vulnerability Description
The application does not validate the presence of required appearance (AP) data before accessing stamp annotation resources. When a PDF contains a stamp annotation missing its AP entry, the code continues to dereference the associated object without a prior null or validity check, which allows a crafted document to trigger a null pointer dereference and crash the application, resulting in denial of service.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
空指针解引用
Source: NVD (National Vulnerability Database)
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，该漏洞源于访问图章注释资源前未验证所需外观数据的存在，可能导致特制文档触发空指针取消引用，引发应用程序崩溃和拒绝服务。
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 2025.3 and earlier | - | |
| Foxit Software Inc. | Foxit PDF Reader | Versions 2025.3 and earlier | - |
II. Public POCs for CVE-2026-3776
| # | POC Description | Source Link | Shenlong Link |
|---|
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No public POC found.
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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-2026-3780 | 7.3 HIGH | Foxit PDF Editor/Reader Installer Uncontrolled Search Path Privilege Escalation |
| 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-2026-3777 | 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 Editor
- CVE-2026-5937
Foxit PDF Editor/Reader's insufficient parameter validation - CVE-2026-5938
Foxit PDF Editor/Reader Infinite Loop Denial-of-Service Vuln - CVE-2026-5940
Foxit PDF Editor/Reader Annotation Use-After-Free Remote Cod - CVE-2026-5942
Foxit PDF Editor/Reader AcroForm Signature Use-After-Free Vu - CVE-2026-5943
Foxit PDF Editor/Reader AcroForm Annotation Use-After-Free R
Same vendor: Foxit Software Inc.
- CVE-2026-5937
Foxit PDF Editor/Reader's insufficient parameter validation - CVE-2026-5938
Foxit PDF Editor/Reader Infinite Loop Denial-of-Service Vuln - CVE-2026-5940
Foxit PDF Editor/Reader Annotation Use-After-Free Remote Cod - CVE-2026-5942
Foxit PDF Editor/Reader AcroForm Signature Use-After-Free Vu - CVE-2026-5943
Foxit PDF Editor/Reader AcroForm Annotation Use-After-Free R
Same weakness: CWE-476
- CVE-2026-8252
Open5GS SMF smf_nsmf_handle_create_data_in_hsmf null pointer - CVE-2026-7259
Null pointer dereference in php_mb_check_encoding() via mb_e - CVE-2026-7262
NULL pointer dereference in SOAP apache:Map decoder with mis - CVE-2026-42183
Argo Workflows: SSO RBAC Delegation Nil Pointer Dereference - CVE-2026-6666
PgBouncer crash in kill_pool_logins_server_error
V. Comments for CVE-2026-3776
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