CVE-2018-25048Network attack vector

Authenticated filesystem access via unresolved online-service paths

Published Mar 23, 2023 · Updated Feb 19, 2025

Path traversal in CODESYS runtime systems allows remote authenticated users to read or modify controller files through online services. The runtime does not properly resolve a received online-service path before enforcing its restricted parent directory, so traversal reaches files outside that boundary. Reachability requires low-privileged network access; runtime-account and host controls bound exposure, while file modification can interrupt the controller.

CVSS severity8.8
High
EPSS probability1.02%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in CODESYS runtime systems allows remote authenticated users to read or modify controller files through online services. The runtime does not properly resolve a received online-service path before enforcing its restricted parent directory, so traversal reaches files outside that boundary. Reachability requires low-privileged network access; runtime-account and host controls bound exposure, while file modification can interrupt the controller.

The record

CVE
CVE-2018-25048
Published
Mar 23, 2023
Updated
Feb 19, 2025
Vendor
CODESYS GmbH
Product
CODESYS Runtime Toolkit 32-bit Full
Classifications
CWE-22, CAPEC-126, T1083, T1005, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 23, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 19, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=2.0.0.0 <2.4.7.52

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

CODESYS GmbH · CODESYS Runtime Toolkit 32-bit Fullversion=2.0.0.0 <2.4.7.52
CODESYS GmbH · CODESYS Control Win V3version=3.0.0.0 <3.5.12.30
CODESYS GmbH · CODESYS V3 Remote Target Visuversion=3.0.0.0 <3.5.12.30
CODESYS GmbH · CODESYS Control Runtime System Toolkitversion=3.0.0.0 <3.5.12.30
CODESYS GmbH · CODESYS V3 Embedded Target Visu Toolkitversion=3.0.0.0 <3.5.12.30
CODESYS GmbH · CODESYS Control RTE V3version=3.0.0.0 <3.5.12.30
CODESYS GmbH · CODESYS Control for BeagleBone SLversion=3.0.0.0 <3.5.12.30
CODESYS GmbH · CODESYS Control for IOT2000 SLversion=3.0.0.0 <3.5.12.30
CODESYS GmbH · CODESYS Control for emPC-A/iMX6 SLversion=3.0.0.0 <3.5.12.30
CODESYS GmbH · CODESYS Runtime PLCWinNTversion=2.0.0.0 <2.4.7.52
CODESYS GmbH · CODESYS HMI V3version=3.0.0.0 <3.5.12.30
CODESYS GmbH · CODESYS Control for PFC100 SLversion=3.0.0.0 <3.5.12.30
CODESYS GmbH · CODESYS V3 Remote Target Visu Toolkitversion=3.0.0.0 <3.5.12.30
CODESYS GmbH · CODESYS Runtime Toolkit 32-bit Embeddedversion=2.0.0.0 <2.3.2.10
CODESYS GmbH · CODESYS Control for PFC200 SLversion=3.0.0.0 <3.5.12.30
CODESYS GmbH · CODESYS Control for Raspberry Pi SLversion=3.0.0.0 <3.5.12.30
CODESYS GmbH · CODESYS V3 Simulation Runtimeversion=3.0.0.0 <3.5.12.30

Published CVSS scores

8.8CERT@VDECVSS:3.1/AV:N/AC:L/PR:L/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.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CAPEC-126Path Traversal
T1083File and Directory Discovery
T1005Data from Local System
T1565.001Stored Data Manipulation

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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