CVE-2026-9550Public exploitNetwork attack vector

Unauthenticated file placement via path traversal

Published May 26, 2026 · Updated May 26, 2026

Path traversal in Acrel Electrical EEMS Enterprise Power Operation and Maintenance Cloud Platform 1.3.0 allows remote attackers to place files. The /SubstationWEBV2/app/..;/main/upfile endpoint accepts the path argument without restricting the resolved destination to the intended upload directory. Unauthenticated network access is sufficient; public evidence establishes out-of-directory file placement but not file reading or code execution.

CVSS severity7.3
High
EPSS probability0.52%
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 Acrel Electrical EEMS Enterprise Power Operation and Maintenance Cloud Platform 1.3.0 allows remote attackers to place files. The /SubstationWEBV2/app/..;/main/upfile endpoint accepts the path argument without restricting the resolved destination to the intended upload directory. Unauthenticated network access is sufficient; public evidence establishes out-of-directory file placement but not file reading or code execution.

The record

CVE
CVE-2026-9550
Published
May 26, 2026
Updated
May 26, 2026
Vendor
Acrel Co., Ltd.
Product
EEMS Enterprise Power Operation and Maintenance Cloud Platform
Classifications
CWE-22, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 26, 2026CVE publishedPublication date reported by the CVE source.
  2. May 26, 2026Record 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=1.3.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Acrel Co., Ltd. · EEMS Enterprise Power Operation and Maintenance Cloud Platformversion=1.3.0

Published CVSS scores

6.9VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
7.3NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

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 exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1190Exploit Public-Facing Application

Public exploit references

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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