CVE-2026-70558Public exploitNetwork attack vector

Unauthenticated file write via unvalidated upload path

Published Aug 6, 2026 · Updated Aug 6, 2026

Unrestricted file upload in DataLinkDC Dinky 1.2.5 and earlier allows remote attackers to write arbitrary files via a crafted path. The uploadFromRsByLocal handler supplies the unvalidated path directly to File and transferTo after comparing a header with a hardcoded default token. Network access and the shipped token suffice; writes run as the service account and can replace web assets immediately or execute code after restart.

CVSS severity9.3
Critical
EPSS probability0.60%
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 DataLinkDC Dinky 1.2.5 and earlier allows remote attackers to write arbitrary files via a crafted path. The uploadFromRsByLocal handler supplies the unvalidated path directly to File and transferTo after comparing a header with a hardcoded default token. Network access and the shipped token suffice; writes run as the service account and can replace web assets immediately or execute code after restart.

The record

CVE
CVE-2026-70558
Published
Aug 6, 2026
Updated
Aug 6, 2026
Vendor
DataLinkDC
Product
Dinky
Classifications
CWE-434, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 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=0 <=1.2.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

DataLinkDC · Dinkyversion=0 <=1.2.5

Published CVSS scores

9.8VulnCheck CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.3VulnCheck CNACVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA: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 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-434Unrestricted Upload of File with Dangerous Type
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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