CVE-2026-71262Network attack vectorHinoki check available

Unauthenticated file access and RCE via path traversal

Published Aug 5, 2026 · Updated Aug 5, 2026

Path traversal in IoTSharp allows remote attackers to read, write, modify, or delete arbitrary files without authentication. BlobStorageController omits authorization, and its Upload, Download, Modify, and Delete actions pass unvalidated path or filename values directly to blob-storage operations. Network access to the exposed API is sufficient; uploaded files placed in web-accessible locations enable remote code execution through a web shell.

CVSS severity9.8
Critical
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Path traversal in IoTSharp allows remote attackers to read, write, modify, or delete arbitrary files without authentication. BlobStorageController omits authorization, and its Upload, Download, Modify, and Delete actions pass unvalidated path or filename values directly to blob-storage operations. Network access to the exposed API is sufficient; uploaded files placed in web-accessible locations enable remote code execution through a web shell.

The record

CVE
CVE-2026-71262
Published
Aug 5, 2026
Updated
Aug 5, 2026
Vendor
IoTSharp
Product
IoTSharp
Classifications
CWE-306, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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 <=*

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IoTSharp · IoTSharpversion=0 <=*

Published CVSS scores

9.8TuranSecCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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 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-306Missing Authentication for Critical Function
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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