handysoft groupware arbitrary file download and execution vulnerability
Priority MEDIUM 43CWE-353Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-345.
Summary
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.
Why it matters now
EPSS 0.00595 48th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| HandySoft | HShell.dll | 1.7.4.5; 2.0.3.5; 4.0.1.6 | — | No fix listed | CNA |
- HShell.dll VendorHandySoft Affected 1.7.4.5; 2.0.3.5; 4.0.1.6 Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:handysoft:hshell:1.7.4.5:*:*:*:*:*:*:* | 1.7.4.5 | Vulnerable | HandySoft |
| cpe:2.3:a:handysoft:hshell:2.0.3.5:*:*:*:*:*:*:* | 2.0.3.5 | Vulnerable | HandySoft |
| cpe:2.3:a:handysoft:hshell:4.0.1.6:*:*:*:*:*:*:* | 4.0.1.6 | Vulnerable | HandySoft |
| cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Microsoft |
- cpe:2.3:a:handysoft:hshell:1.7.4.5:*:*:*:*:*:*:* Versions 1.7.4.5 Vulnerable ·HandySoft
- cpe:2.3:a:handysoft:hshell:2.0.3.5:*:*:*:*:*:*:* Versions 2.0.3.5 Vulnerable ·HandySoft
- cpe:2.3:a:handysoft:hshell:4.0.1.6:*:*:*:*:*:*:* Versions 4.0.1.6 Vulnerable ·HandySoft
- cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-26608
- 2026-10-03 Alias added: GHSA-744f-76g7-h835
References
Sources
- CVE-2021-26608 · CVE Program
- CVE-2021-26608 · NVD
- FIRST EPSS
- GHSA-744f-76g7-h835 · GitHub Advisory Database · CC BY 4.0
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