CVE-2021-39841— Adobe Acrobat Pro DC DocMedia Type Confusion Remote Code Execution Vulnerability
Quick assessment
Affected
Adobe Acrobat Reader
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
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Adobe Reader存在代码问题漏洞，该漏洞的存在是由于一个NULL指针解除引用错误。远程攻击者可利用该漏洞可以欺骗受害者打开一个特制的文件并执行拒绝服务(DoS)攻击。该漏洞允许远程攻击者可利用该漏洞执行拒绝服务(DoS)攻击。
Possible ATT&CK Techniques 3 AI
T1001 · Data Obfuscation T1059 · Command and Scripting Interpreter T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2021-39841
Vulnerability Information
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Vulnerability Title
Adobe Acrobat Pro DC DocMedia Type Confusion Remote Code Execution Vulnerability
Source: CVE Program / CVE List V5
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 Type Confusion vulnerability. An attacker could leverage this vulnerability to execute arbitrary code in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
使用不兼容类型访问资源(类型混淆)
Source: CVE Program / CVE List V5
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Adobe Reader存在代码问题漏洞，该漏洞的存在是由于一个NULL指针解除引用错误。远程攻击者可利用该漏洞可以欺骗受害者打开一个特制的文件并执行拒绝服务(DoS)攻击。该漏洞允许远程攻击者可利用该漏洞执行拒绝服务(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-2021-39841
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2021-39841 (1)
-
https://helpx.adobe.com/security/products/acrobat/apsb21-55.html x_refsource_MISC
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-2021-39856 | 6.5 MEDIUM | Adobe Acrobat Reader DC NTLMv2 SSO Information Disclosure via LoadFile |
| CVE-2021-39855 | 6.5 MEDIUM | Adobe Acrobat Reader DC NTLMv2 SSO Information Disclosure via src Parameter |
| 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-2021-39850 | 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-2021-39839 | Adobe Acrobat Reader DC AcroForm getItemAt Use-After-Free Remote Code Execution Vulnerabil | |
| 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 |
Showing top 20 of 41 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Acrobat Reader
-
CVE-2026-48373
Acrobat Reader | Heap-based Buffer Overflow (CWE-122) -
CVE-2020-9695
Acrobat Reader | Out-of-bounds Write (CWE-787) -
CVE-2020-9711
Acrobat Reader | Out-of-bounds Read (CWE-125) -
CVE-2020-9713
Acrobat Reader | Out-of-bounds Read (CWE-125) -
CVE-2026-47965
Acrobat Reader | Out-of-bounds Write (CWE-787)
Same vendor: Adobe
-
CVE-2026-48414
Adobe Commerce | Cross-site Scripting (Stored XSS) (CWE-79) -
CVE-2026-48416
Adobe Commerce | Incorrect Authorization (CWE-863) -
CVE-2026-48413
Adobe Commerce | Cross-site Scripting (Stored XSS) (CWE-79) -
CVE-2026-48415
Adobe Commerce | Incorrect Authorization (CWE-863) -
CVE-2026-48412
Adobe Commerce | Incorrect Authorization (CWE-863)
Same weakness: CWE-843
V. Comments for CVE-2021-39841
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