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CVE-2021-26608— handysoft groupware arbitrary file download and execution vulnerability

Quick assessment

Affected
handysoft HShell.dll
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.

Handysoft是韩国HANDYSOFT（Handysoft）公司的一个用于智能办公的协作解决方案。 Handysoft 的ActiveX控件的HShell.dll存在安全漏洞，该漏洞源于缺少对下载URL或下载文件哈希完整性检查。攻击者可利用该漏洞下载和执行任意文件

CVSS 8.8 · High EPSS 0.60% · P48

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-26608

Vulnerability Information
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Vulnerability Title
handysoft groupware arbitrary file download and execution vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
An arbitrary file download and execution vulnerability was found in the HShell.dll of handysoft Co., Ltd groupware ActiveX module. This issue is due to missing support for integrity check of download URL or downloaded file hash.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
缺失完整性检查支持
Source: CVE Program / CVE List V5
Vulnerability Title
Handysoft 数据伪造问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Handysoft是韩国HANDYSOFT（Handysoft）公司的一个用于智能办公的协作解决方案。 Handysoft 的ActiveX控件的HShell.dll存在安全漏洞，该漏洞源于缺少对下载URL或下载文件哈希完整性检查。攻击者可利用该漏洞下载和执行任意文件
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
handysoft HShell.dll 1.7.4.5 -

II. Public POCs for CVE-2021-26608

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III. Intelligence Information for CVE-2021-26608

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IV. Related Vulnerabilities

Same vendor: handysoft
Same weakness: CWE-353