CVE-2024-39937Network attack vector

Unauthenticated file disclosure via download path traversal

Published Jul 4, 2024 · Updated Nov 10, 2025

Path traversal in Bluetron Digital Technology supOS 5.0 allows remote attackers to read server files through the image download API. The api/image/download endpoint accepts ../ sequences in its fileName parameter and resolves the resulting path outside the intended image directory. No authentication or user interaction is required, and the demonstrated consequence is file disclosure without file modification or service interruption.

CVSS severity8.6
High
EPSS probability0.86%
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 Bluetron Digital Technology supOS 5.0 allows remote attackers to read server files through the image download API. The api/image/download endpoint accepts ../ sequences in its fileName parameter and resolves the resulting path outside the intended image directory. No authentication or user interaction is required, and the demonstrated consequence is file disclosure without file modification or service interruption.

The record

CVE
CVE-2024-39937
Published
Jul 4, 2024
Updated
Nov 10, 2025
Vendor
Bluetron Digital Technology Co., Ltd.
Product
supOS
Classifications
CWE-22, T1005, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 4, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 10, 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?

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  1. Affected versionversion=5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Bluetron Digital Technology Co., Ltd. · supOSversion=5.0

Published CVSS scores

8.6MITRECVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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.

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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-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1005Data from Local System
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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