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CVE-2021-39863— Adobe Acrobat Reader DC Heap-based Buffer Overflow Vulnerability Could Lead To Arbitrary Code Execution

Quick assessment

Affected
Adobe Acrobat Reader
Exploitation
Public or AI PoC available; prioritize validation
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 Reader存在安全漏洞，该漏洞源于处理 PDF 文件时的边界错误。远程攻击者可以欺骗受害者打开特制的 PDF 文件，触发基于堆的缓冲区溢出并在目标系统上执行任意代码。

CVSS 7.8 · High EPSS 13.19% · P96
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I. Basic Information for CVE-2021-39863

Vulnerability Information
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Vulnerability Title
Adobe Acrobat Reader DC Heap-based Buffer Overflow Vulnerability Could Lead To Arbitrary Code Execution
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 Buffer Overflow vulnerability when parsing a specially crafted PDF file. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution 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
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
堆缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Adobe Acrobat和Adobe Reader 安全漏洞
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存在安全漏洞，该漏洞源于处理 PDF 文件时的边界错误。远程攻击者可以欺骗受害者打开特制的 PDF 文件，触发基于堆的缓冲区溢出并在目标系统上执行任意代码。
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
Adobe Acrobat Reader unspecified ~ DC 2021 July -

II. Public POCs for CVE-2021-39863

# POC Description Source Link Shenlong Link
1 None https://github.com/lsw29475/CVE-2021-39863 POC Details
2 None https://github.com/WHS-SEGFAULT/CVE-2021-39863 POC Details
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III. Intelligence Information for CVE-2021-39863

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Vendor Advisories for CVE-2021-39863 (1)

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-2021-40715 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-2021-39851 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-2021-39861 5.5 MEDIUM Adobe Acrobat Reader DC Catalog Plugin Out-of-Bounds Read Bug
CVE-2021-39844 3.3 LOW Adobe Acrobat Reader CalRGB Out-of-Bounds Read 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-2021-39853 Adobe Acrobat Reader DC Null Pointer Dereference Could Lead To Application Denial-of-Servi
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

Same product: Acrobat Reader
Same vendor: Adobe
Same weakness: CWE-122

V. Comments for CVE-2021-39863

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