CVE-2026-4536Network attack vector

Unauthenticated dangerous file upload through undisclosed handler

Published Mar 22, 2026 · Updated Mar 22, 2026

Unrestricted file upload in Acrel Environmental Monitoring Cloud Platform 1.1.0 allows remote attackers to upload dangerous files. The CNA record does not identify the upload endpoint, parameter, accepted file types, storage path, or missing validation operation. No authentication or user interaction is required; the reported consequence is limited to low confidentiality, integrity, and availability impact.

CVSS severity7.3
High
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in Acrel Environmental Monitoring Cloud Platform 1.1.0 allows remote attackers to upload dangerous files. The CNA record does not identify the upload endpoint, parameter, accepted file types, storage path, or missing validation operation. No authentication or user interaction is required; the reported consequence is limited to low confidentiality, integrity, and availability impact.

The record

CVE
CVE-2026-4536
Published
Mar 22, 2026
Updated
Mar 22, 2026
Vendor
Acrel Co., Ltd.
Product
Environmental Monitoring Cloud Platform
Classifications
CWE-434, CWE-284, T1105, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 22, 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=1.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Acrel Co., Ltd. · Environmental Monitoring Cloud Platformversion=1.1.0

Published CVSS scores

7.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
7.5VulDBAV:N/AC:L/Au:N/C:P/I:P/A:P
5.5VulDBCVSS: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

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
CWE-284Improper Access Control
T1105Ingress Tool Transfer
T1190Exploit Public-Facing Application

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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