What is the CVSS score of CVE-2025-41700?

CVE-2025-41700 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.0%.

Which versions of Codesys are affected by CVE-2025-41700?

CVE-2025-41700 affects CODESYS development systems and allows arbitrary code execution when users open malicious project files, potentially compromising engineering workstations and intellectual…. A patch is available.

How to fix or mitigate CVE-2025-41700?

Within 24 hours: Identify all CODESYS installations across engineering and development teams; communicate a temporary restriction on opening untrusted CODESYS project files until patching is complete. Within 7 days: Apply vendor-released patch to all CODESYS development systems (obtain specific patched version number from CODESYS vendor advisory). Within 30 days: Conduct security awareness training for engineers on file-based attack vectors and verify patch deployment across all in-scope systems.

Codesys CVE-2025-41700

EUVD-2025-199974 HIGH

Deserialization of Untrusted Data (CWE-502)

2025-12-01 info@cert.vde.com

RCE Deserialization Codesys

7.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.8 HIGH

AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Updated

Apr 16, 2026 - 06:25 EUVD-patch-fix

executive_summary

Re-analysis Queued

Apr 16, 2026 - 05:29 backfill_euvd_patch

patch_released

Patch available

Apr 16, 2026 - 05:29 EUVD

3.5.21.40

EUVD ID Assigned

Mar 15, 2026 - 13:34 euvd

EUVD-2025-199974

Analysis Generated

Mar 15, 2026 - 13:34 vuln.today

CVE Published

Dec 01, 2025 - 10:16 nvd

HIGH 7.8

DescriptionCVE.org

An unauthenticated attacker can trick a local user into executing arbitrary code by opening a deliberately manipulated CODESYS project file with a CODESYS development system. This arbitrary code is executed in the user context.

Analysis

Technical ContextAI

Insecure deserialization occurs when untrusted data is used to reconstruct objects, allowing attackers to manipulate serialized data to execute arbitrary code. This vulnerability is classified as Deserialization of Untrusted Data (CWE-502).

RemediationAI

Avoid deserializing untrusted data. Use safe serialization formats (JSON instead of native serialization). Implement integrity checks on serialized data.

CVE-2025-41700 vulnerability details – vuln.today

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Codesys CVE-2025-41700

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

Analysis

Technical ContextAI

RemediationAI

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External POC / Exploit Code