CVE-2023-39479Known exploitationPublic exploitNetwork attack vector

Authenticated directory creation via unreverted MoveOrCopy state

Published May 3, 2024 · Updated Aug 2, 2024

Improper filesystem access in Softing Secure Integration Server 1.22.0.8686 allows remote authenticated users to create directories. MoveOrCopy accepts a full path for an uninitialized FileDirectory, creates that directory, and fails without reverting the resulting SetPath state. Exploitation requires a crafted mapped OPC UA address space and sufficient authentication; alone, the flaw creates directories rather than files or code execution.

CVSS severity6.6
Medium
EPSS probability1.58%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper filesystem access in Softing Secure Integration Server 1.22.0.8686 allows remote authenticated users to create directories. MoveOrCopy accepts a full path for an uninitialized FileDirectory, creates that directory, and fails without reverting the resulting SetPath state. Exploitation requires a crafted mapped OPC UA address space and sufficient authentication; alone, the flaw creates directories rather than files or code execution.

The record

CVE
CVE-2023-39479
Published
May 3, 2024
Updated
Aug 2, 2024
Vendor
Softing Industrial Automation GmbH
Product
Secure Integration Server
Classifications
CWE-552
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 16, 2023Exploitation reportedPwn2Own ICS Secure Integration Server exploit chain
  2. May 3, 2024CVE publishedPublication date reported by the CVE source.
  3. Aug 2, 2024Record 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=1.22.0.8686

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Softing Industrial Automation GmbH · Secure Integration Serverversion=1.22.0.8686

Published CVSS scores

8.8NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.6Zero Day InitiativeCVSS:3.0/AV:N/AC:H/PR:H/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-552Files or Directories Accessible to External Parties

Public exploit references

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Reported exploitation

Technologies

Your stack

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Your stack

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