CVE-2020-7804Network attack vector

Arbitrary command execution via ShellExec input

Published Apr 29, 2020 · Updated Aug 4, 2024

OS command injection in Handysoft Groupware HShell.dll 1.7.3.1 allows remote authenticated users to execute arbitrary commands. The ShellExec method accepts attacker-controlled parameters and forwards them to operating-system command execution without adequate neutralization. Exploitation requires high privileges and user interaction, and successful commands run with the affected Windows process privileges.

CVSS severity6.4
Medium
EPSS probability0.97%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Handysoft Groupware HShell.dll 1.7.3.1 allows remote authenticated users to execute arbitrary commands. The ShellExec method accepts attacker-controlled parameters and forwards them to operating-system command execution without adequate neutralization. Exploitation requires high privileges and user interaction, and successful commands run with the affected Windows process privileges.

The record

CVE
CVE-2020-7804
Published
Apr 29, 2020
Updated
Aug 4, 2024
Vendor
Handysoft
Product
HShell.dll
Classifications
CWE-78, T1203
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Apr 29, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.7.3.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Handysoft · HShell.dllversion=1.7.3.1

Published CVSS scores

6.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:P
6.4KrCERT/CCCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:L/A:H
7.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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