CVE-2023-30757

Project source disclosure via stale block encryption

Published Jun 13, 2023 · Updated Dec 10, 2024

Protection mechanism failure in Siemens TIA Portal V14 through V20 allows local users with a project file to recover unprotected block versions. The know-how protection feature retains earlier program-block content without updating its encryption when an existing project file is updated. Access to the project file is required, and the resulting disclosure is limited to previous unprotected block versions without requiring the know-how protection password.

CVSS severity6.2
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Protection mechanism failure in Siemens TIA Portal V14 through V20 allows local users with a project file to recover unprotected block versions. The know-how protection feature retains earlier program-block content without updating its encryption when an existing project file is updated. Access to the project file is required, and the resulting disclosure is limited to previous unprotected block versions without requiring the know-how protection password.

The record

CVE
CVE-2023-30757
Published
Jun 13, 2023
Updated
Dec 10, 2024
Vendor
Siemens
Product
Totally Integrated Automation Portal (TIA Portal)
Classifications
CWE-693, T1005
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 13, 2023CVE publishedPublication date reported by the CVE source.
  2. Dec 10, 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=0 <*

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Siemens · Totally Integrated Automation Portal (TIA Portal)version=0 <*

Published CVSS scores

6.2Siemens ProductCERTCVSS:3.1/AV:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-693Protection Mechanism Failure
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

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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