CVE-2020-25244

Host takeover via uncontrolled DLL search path

Published Apr 22, 2021 · Updated Aug 4, 2024

DLL hijacking in Siemens LOGO! Soft Comfort before 8.4 allows local users to take over the host through unsafe library loading. The application's library loader resolves a DLL through an uncontrolled search path, allowing attacker-supplied code to load in its process. Exploitation requires local placement of a crafted DLL; the code receives the application's privileges and can read, alter, or interrupt host resources.

CVSS severity8.4
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

DLL hijacking in Siemens LOGO! Soft Comfort before 8.4 allows local users to take over the host through unsafe library loading. The application's library loader resolves a DLL through an uncontrolled search path, allowing attacker-supplied code to load in its process. Exploitation requires local placement of a crafted DLL; the code receives the application's privileges and can read, alter, or interrupt host resources.

The record

CVE
CVE-2020-25244
Published
Apr 22, 2021
Updated
Aug 4, 2024
Vendor
Siemens
Product
LOGO! Soft Comfort
Classifications
CWE-427, T1574.001
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 22, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=All versions < V8.4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Siemens · LOGO! Soft Comfortversion=All versions < V8.4

Published CVSS scores

8.4Siemens ProductCERTCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.2NIST NVDAV:L/AC:L/Au:N/C:C/I:C/A:C

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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-427Uncontrolled Search Path Element
T1574.001DLL Search Order Hijacking

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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