CVE-2021-39850— Adobe Acrobat Reader DC Null Pointer Dereference Could Lead To Application Denial-of-Service
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I. Basic Information for CVE-2021-39850
Vulnerability Information
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Vulnerability Title
Adobe Acrobat Reader DC Null Pointer Dereference Could Lead To Application Denial-of-Service
Source: NVD (National Vulnerability Database)
Vulnerability Description
Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) are affected by a Null pointer dereference vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve an application denial-of-service in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
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
Adobe Acrobat和Adobe Reader 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Adobe Acrobat和Adobe Reader都是美国奥多比（Adobe）公司的产品。Adobe Acrobat是一套PDF文件编辑和转换工具。Adobe Reader是一套PDF文档阅读软件。 Adobe Acrobat 和 Reader存在代码问题漏洞，该漏洞源于NULL 指针取消引用错误。远程攻击者可以诱使受害者打开特制文件并执行拒绝服务 (DoS) 攻击。
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 |
|---|---|---|---|---|
| Adobe | Acrobat Reader | unspecified ~ DC 2021 July | - |
II. Public POCs for CVE-2021-39850
| # | POC Description | Source Link | Shenlong Link |
|---|
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No public POC found.
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- https://helpx.adobe.com/security/products/acrobat/apsb21-55.htmlx_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2021-39850
Same Patch Batch · Adobe · 2021-09-29 · 41 CVEs total
| CVE-2021-39831 | 7.8 HIGH | Adobe FrameMaker PDF File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability |
| CVE-2021-39863 | 7.8 HIGH | Adobe Acrobat Reader DC Heap-based Buffer Overflow Vulnerability Could Lead To Arbitrary C |
| CVE-2021-40715 | 7.8 HIGH | Adobe Premiere Pro 2021 EXR File Parsing Leads to Memory Corruption |
| CVE-2021-39843 | 7.8 HIGH | Adobe Acrobat Reader XObject Out-of-Bound Write Vulnerability |
| CVE-2021-40708 | 7.3 HIGH | Adobe Genuine Service Installer Privilege Escalation Vulnerability |
| CVE-2021-39855 | 6.5 MEDIUM | Adobe Acrobat Reader DC NTLMv2 SSO Information Disclosure via src Parameter |
| CVE-2021-39856 | 6.5 MEDIUM | Adobe Acrobat Reader DC NTLMv2 SSO Information Disclosure via LoadFile |
| CVE-2021-39846 | 6.1 MEDIUM | Adobe Acrobat Reader /Parent Property Recursive Stack Overflow |
| CVE-2021-39845 | 6.1 MEDIUM | Adobe Acrobat Reader Page Tree Node Recursive Stack Overflow |
| CVE-2021-39861 | 5.5 MEDIUM | Adobe Acrobat Reader DC Catalog Plugin Out-of-Bounds Read Bug |
| CVE-2021-39851 | 5.5 MEDIUM | Adobe Acrobat Reader DC Null Pointer Dereference Could Lead To Application Denial-of-Servi |
| CVE-2021-39852 | 5.5 MEDIUM | Adobe Acrobat Reader DC Null Pointer Dereference Could Lead To Application Denial-of-Servi |
| CVE-2021-39849 | 5.5 MEDIUM | Adobe Acrobat Reader DC Null Pointer Dereference Could Lead To Application Denial-of-Servi |
| CVE-2021-39860 | 5.5 MEDIUM | Adobe Acrobat Reader DC Search Plugin Null Pointer Dereference |
| CVE-2021-39844 | 3.3 LOW | Adobe Acrobat Reader CalRGB Out-of-Bounds Read Vulnerability |
| CVE-2021-39832 | Adobe FrameMaker PDF File Parsing Memory Corruption Remote Code Execution Vulnerability | |
| CVE-2021-39836 | Adobe Acrobat Reader DC AcroForm buttonGetIcon Use-After-Free Remote Code Execution Vulner | |
| CVE-2021-39835 | Adobe FrameMaker PDF File Parsing Use-After-Free Information Disclosure Vulnerability | |
| CVE-2021-39837 | Adobe Acrobat Reader DC AcroForm deleteItemAt Use-After-Free Remote Code Execution Vulnera | |
| CVE-2021-39839 | Adobe Acrobat Reader DC AcroForm getItemAt Use-After-Free Remote Code Execution Vulnerabil |
Showing top 20 of 41 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
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Acrobat Reader | Improperly Controlled Modification of Objec - CVE-2026-34621
Acrobat Reader | Improperly Controlled Modification of Objec - CVE-2026-27221
Acrobat Reader | Improper Certificate Validation (CWE-295) - CVE-2026-27278
Acrobat Reader | Use After Free (CWE-416)
Same vendor: Adobe
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Adobe Framemaker | Integer Underflow (Wrap or Wraparound) (C - CVE-2026-27290
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Same weakness: CWE-476
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V. Comments for CVE-2021-39850
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