CVE-2021-26608

CriticalCVSS 9.8/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-353 CWE-345

Affected software

Vendor	Product	Versions
handysoft	HShell.dll	1.7.4.5; 2.0.3.5; 4.0.1.6

References

https://www.boho.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=36239Third Party Advisory
https://www.boho.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=36239Third Party Advisory

Timeline

Published: Sep 9, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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