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Vulnerabilities

Vulnerability · CVE-2025-41691

An unauthenticated remote attacker may trigger a NULL pointer dereference in the affected CODESYS Control runtime systems by sending specially crafted communication requests, poten

Published Aug 4, 2025 · catalog updated Aug 4, 2025 · CODESYS Control for IOT2000 SL

Last checked Oct 23, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-41691. EPSS is 0.55%. Act only if a listed version of CODESYS Control for IOT2000 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
0.55%
Remediation
Version ranges on file
Affected products
vendor CODESYS Control for IOT2000 SL 4.16.0.0 <4.17.0.0

An unauthenticated remote attacker may trigger a NULL pointer dereference in the affected CODESYS Control runtime systems by sending specially crafted communication requests, 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 Control for IOT2000 SL 4.16.0.0 <4.17.0.04.16.0.0 <4.17.0.0

How to fix CVE-2025-41691

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-2025-41691. EPSS is 0.55%. Act only if a listed version of CODESYS Control for IOT2000 SL is installed.

Which versions are affected?

Compare what you have installed with CODESYS Control for IOT2000 SL 4.16.0.0 <4.17.0.0 4.16.0.0 <4.17.0.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.55%. 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. Aug 4, 2025 · EUVD

    Detected

    An unauthenticated remote attacker may trigger a NULL pointer dereference in the affected CODESYS Control runtime systems by sending specially crafted communication requests, potentially leading to a denial-of-service (DoS) condition.

  2. Aug 4, 2025 · EUVD

    Updated

    An unauthenticated remote attacker may trigger a NULL pointer dereference in the affected CODESYS Control runtime systems by sending specially crafted communication requests, potentially leading to a denial-of-service (DoS) condition.

Sources

  • CVE.orgVulnerability recordCVE-2025-41691

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-41691

    30-day exploitation probability 0.55%

    first.org
  • EUVDVulnerability recordEUVD-2025-23490

    An unauthenticated remote attacker may trigger a NULL pointer dereference in the affected CODESYS Control runtime systems by sending specially crafted communication requests, potentially leading to a denial-of-service (DoS) condition.

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 23, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSOct 23, 2026
  • CVE.orgOct 21, 2026
  • EUVDOct 21, 2026