CVE-2025-54819Network attack vector

Authenticated file overwrite via path traversal

Published Aug 28, 2025 · Updated Aug 28, 2025

Path traversal in DOS Co., Ltd. SS1 16.0.0.10 and earlier and SS1 Cloud 2.1.3 and earlier allows remote authenticated users to overwrite files. The affected SS1 and SS1 Cloud agents accept a pathname that escapes its intended directory, allowing a legitimate file at the traversed location to be replaced. Access to an authenticated network function is required; published details identify file overwrite as the demonstrated consequence but do not name the endpoint or parameter.

CVSS severity7.1
High
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in DOS Co., Ltd. SS1 16.0.0.10 and earlier and SS1 Cloud 2.1.3 and earlier allows remote authenticated users to overwrite files. The affected SS1 and SS1 Cloud agents accept a pathname that escapes its intended directory, allowing a legitimate file at the traversed location to be replaced. Access to an authenticated network function is required; published details identify file overwrite as the demonstrated consequence but do not name the endpoint or parameter.

The record

CVE
CVE-2025-54819
Published
Aug 28, 2025
Updated
Aug 28, 2025
Vendor
DOS Co., Ltd.
Product
SS1 Cloud
Classifications
CWE-22, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 28, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 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=Ver.2.1.3 and earlier

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

DOS Co., Ltd. · SS1 Cloudversion=Ver.2.1.3 and earlier
DOS Co., Ltd. · SS1version=Ver.16.0.0.10 and earlier (Media version:16.0.0a and earlier)

Published CVSS scores

7.1JPCERT/CCCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
6.5JPCERT/CCCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1565.001Stored Data Manipulation

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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