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Vulnerabilities

Vulnerability · CVE-2025-41738

An unauthenticated remote attacker may cause the visualisation server of the CODESYS Control runtime system to access a resource with a pointer of wrong type, potentially leading t

Published Dec 1, 2025 · catalog updated Dec 1, 2025 · CODESYS CODESYS HMI (SL)

Last checked Nov 7, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-41738. EPSS is 0.42%. Act only if a listed version of CODESYS CODESYS HMI (SL) is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.42%
Remediation
Version ranges on file
Affected products
vendor CODESYS CODESYS HMI (SL) 3.5.18.0 <3.5.21.40

An unauthenticated remote attacker may cause the visualisation server of the CODESYS Control runtime system to access a resource with a pointer of wrong type, potentially leading to a denial-of-service (DoS) condition.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor CODESYS CODESYS HMI (SL) 3.5.18.0 <3.5.21.403.5.18.0 <3.5.21.40

How to fix CVE-2025-41738

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-41738. EPSS is 0.42%. Act only if a listed version of CODESYS CODESYS HMI (SL) is installed.

Which versions are affected?

Compare what you have installed with CODESYS CODESYS HMI (SL) 3.5.18.0 <3.5.21.40 3.5.18.0 <3.5.21.40. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.42%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Dec 1, 2025 · EUVD

    Detected

    An unauthenticated remote attacker may cause the visualisation server of the CODESYS Control runtime system to access a resource with a pointer of wrong type, potentially leading to a denial-of-service (DoS) condition.

  2. Dec 1, 2025 · EUVD

    Updated

    An unauthenticated remote attacker may cause the visualisation server of the CODESYS Control runtime system to access a resource with a pointer of wrong type, potentially leading to a denial-of-service (DoS) condition.

Sources

  • CVE.orgVulnerability recordCVE-2025-41738

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-41738

    30-day exploitation probability 0.42%

    first.org
  • EUVDVulnerability recordEUVD-2025-199975

    An unauthenticated remote attacker may cause the visualisation server of the CODESYS Control runtime system to access a resource with a pointer of wrong type, potentially leading to a denial-of-service (DoS) condition.

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 7, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 7, 2026
  • CVE.orgOct 28, 2026
  • EUVDOct 28, 2026