CVE-2021-26630: HANDY Groupware file download and execute vulnerability

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-05-19 · updated 2026-06-17
Weakness: CWE-20

Description

Improper input validation vulnerability in HANDY Groupware’s ActiveX moudle allows attackers to download or execute arbitrary files. This vulnerability can be exploited by using the file download or execution path as the parameter value of the vulnerable function.

Affected products

Handysoft Co.,Ltd HANDY Groupware: before 1.7.4.7; from 2.0.0.0 before 2.0.3.7; from 4.0.0.0 before 4.0.1.8 — fixed in 1.7.4.7, 2.0.3.7, 4.0.1.8

How to fix

Upgrade to a fixed version: Handysoft Co.,Ltd HANDY Groupware 1.7.4.7, 2.0.3.7, 4.0.1.8. Check the vendor advisory for mitigations.

References

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