CVE-2024-0939Public exploitNetwork attack vector

Server takeover via unrestricted PHP file upload

Published Jan 26, 2024 · Updated May 29, 2025

Unrestricted file upload in Byzoro Smart S210 Management Platform 20240117 allows remote authenticated users to gain server access. The /Tool/uploadfile.php endpoint accepts an attacker-named PHP file through file_upload and writes it to the attacker-controlled txt_path without restricting executable types or destinations. A valid session is required; the uploaded PHP can execute attacker-supplied commands and manipulate server files.

CVSS severity9.8
Critical
EPSS probability43.78%
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 Byzoro Smart S210 Management Platform 20240117 allows remote authenticated users to gain server access. The /Tool/uploadfile.php endpoint accepts an attacker-named PHP file through file_upload and writes it to the attacker-controlled txt_path without restricting executable types or destinations. A valid session is required; the uploaded PHP can execute attacker-supplied commands and manipulate server files.

The record

CVE
CVE-2024-0939
Published
Jan 26, 2024
Updated
May 29, 2025
Vendor
Byzoro
Product
Smart S210 Management Platform
Classifications
CWE-434, T1190, T1505.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 26, 2024CVE publishedPublication date reported by the CVE source.
  2. May 29, 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=20240117

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Byzoro · Smart S210 Management Platformversion=20240117

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P
6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1190Exploit Public-Facing Application
T1505.003Web Shell

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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