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CVE-2021-20839

Quick assessment

Affected
Antenna House, Inc. Office Server Document Converter
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.

Antenna House Office Server Document Converter（Osdc）是美国Antenna House公司的一个办公服务器文档转换器。用于将 Word、Excel 和 Powerpoint 批量转换为易于共享且在任何屏幕上看起来都准确的高质量 Pdf 或图像格式。 Office Server Document Converter 存在代码问题漏洞，该漏洞源于在其它服务器中对用户提供的XML输入验证不足，远程攻击者可利用该漏洞向受影响的应用程序传递专门编写的XML代码，并在

AI Predicted 7.5 Difficulty: Easy EPSS 1.14% · P64
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I. Basic Information for CVE-2021-20839

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Office Server Document Converter V7.2MR4 and earlier and V7.1MR7 and earlier allows a remote unauthenticated attacker to conduct an XML External Entity (XXE) attack to cause a denial of service (DoS) condition to the other servers by processing a specially crafted XML document.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Antenna House Office Server Document Converter 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Antenna House Office Server Document Converter（Osdc）是美国Antenna House公司的一个办公服务器文档转换器。用于将 Word、Excel 和 Powerpoint 批量转换为易于共享且在任何屏幕上看起来都准确的高质量 Pdf 或图像格式。 Office Server Document Converter 存在代码问题漏洞，该漏洞源于在其它服务器中对用户提供的XML输入验证不足，远程攻击者可利用该漏洞向受影响的应用程序传递专门编写的XML代码，并在
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
Antenna House, Inc. Office Server Document Converter V7.2MR4 and earlier and V7.1MR7 and earlier -

II. Public POCs for CVE-2021-20839

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2021-20839

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Vendor Advisories for CVE-2021-20839 (1)

Other References for CVE-2021-20839 (1)

IV. Related Vulnerabilities

Same product: Office Server Document Converter
Same vendor: Antenna House, Inc.

V. Comments for CVE-2021-20839

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