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TI-2025-27663 Aliases CVE-2025-41700GHSA-cx2q-9f4q-7mgw

CODESYS Development System - Deserialization of Untrusted Data

Priority LOW 35CWE-502Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-502.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00166 5th percentileScored 2026-11-07
Fix Fixed CODESYS Development System (CODESYS): 3.5.21.40

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
CODESYSCODESYS Development System0.0.0 to before 3.5.21.403.5.21.40Patch availableCNA
  • CODESYS Development System VendorCODESYS Affected 0.0.0 to before 3.5.21.40 Fixed in 3.5.21.40 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:codesys:codesys:*:*:*:*:*:*:*:*before 3.5.21.40VulnerableCODESYS
  • cpe:2.3:a:codesys:codesys:*:*:*:*:*:*:*:* Versions before 3.5.21.40 Vulnerable ·CODESYS

Remediation

  • Fix · CNA CODESYS Development System (CODESYS) Fixed in 3.5.21.40

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-41700
  2. 2026-10-03 Alias added: GHSA-cx2q-9f4q-7mgw

References

Advisory 1

  • TI-2021-13604 CODESYS V2 web server: crafted requests could trigger a null pointer dereference (DoS) CVSS 3.1HIGH 7.5
  • TI-2019-12244 CODESYS V2.3 ENI server up to V3.2.2.24 has a Buffer Overflow. CVSS 3.1CRITICAL 9.8
  • TI-2021-13601 CODESYS V2 web server: crafted requests could trigger a heap-based buffer overflow (DoS) CVSS 3.1HIGH 7.5
  • TI-2021-13602 CODESYS V2 web server: crafted requests could trigger a buffer over-read (DoS) CVSS 3.1CRITICAL 9.1
  • TI-2019-10170 3S-Smart Software Solutions GmbH CODESYS V3 Library Manager, all versions prior to… CVSS 3.1HIGH 8.6
  • TI-2021-04914 Deserialization of untrusted data in CODESYS CVSS 3.1HIGH 7.8
See all 12 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences