CVE-2025-20055Network attack vector

Unauthenticated OS command execution via undisclosed input handling

Published Jan 14, 2025 · Updated Jan 14, 2025

OS command injection in Y'S Corporation STEALTHONE D220 and D340 firmware 6.03.02 and earlier allows remote attackers to execute OS commands. Public advisories do not identify the affected request handler, parameter, or operation that passes untrusted input to an OS command. Network access is sufficient; no authentication or user interaction is required, and exploitation grants command execution on the storage server.

CVSS severity9.8
Critical
EPSS probability1.17%
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 and D340 firmware 6.03.02 and earlier allows remote attackers to execute OS commands. Public advisories do not identify the affected request handler, parameter, or operation that passes untrusted input to an OS command. Network access is sufficient; no authentication or user interaction is required, and exploitation grants command execution on the storage server.

The record

CVE
CVE-2025-20055
Published
Jan 14, 2025
Updated
Jan 14, 2025
Vendor
Y'S Corporation
Product
STEALTHONE D340
Classifications
CWE-78, T1059
Attack vector
network
Privileges
unauthenticated

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

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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=firmware v6.03.02 and earlier

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

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

Published CVSS scores

9.8JPCERT/CCCVSS:3.1/AV:N/AC:L/PR:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
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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