CVE-2025-20016Network attack vector

Administrative OS command execution via web input injection

Published Jan 14, 2025 · Updated Jan 14, 2025

OS command injection in Y'S Corporation STEALTHONE D220, D340, and D440 firmware allows remote authenticated users to execute OS commands. Neither JPCERT/CC nor the vendor's public release notice identifies the affected handler, parameter, or shell-construction error. Exploitation requires an administrator already logged in to the web management page; arbitrary commands can read or alter stored data and interrupt service.

CVSS severity7.2
High
EPSS probability1.14%
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 Y'S Corporation STEALTHONE D220, D340, and D440 firmware allows remote authenticated users to execute OS commands. Neither JPCERT/CC nor the vendor's public release notice identifies the affected handler, parameter, or shell-construction error. Exploitation requires an administrator already logged in to the web management page; arbitrary commands can read or alter stored data and interrupt service.

The record

CVE
CVE-2025-20016
Published
Jan 14, 2025
Updated
Jan 14, 2025
Vendor
Y'S Corporation
Product
STEALTHONE D340
Classifications
CWE-78, T1059
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jan 14, 2025CVE publishedPublication date reported by the CVE source.
  2. Jan 14, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=firmware v6.03.02 and earlier

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Y'S Corporation · STEALTHONE D340version=firmware v6.03.02 and earlier
Y'S Corporation · STEALTHONE D440version=firmware v7.00.10 and earlier
Y'S Corporation · STEALTHONE D220version=firmware v6.03.02 and earlier

Published CVSS scores

7.2JPCERT/CCCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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')
T1059Command and Scripting Interpreter

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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