CODESYS Control RTE (SL): Access of Resource Using Incompatible Type
CVE-2025-41738 is a high-severity access of resource using incompatible type vulnerability in CODESYS Control RTE (SL) from Codesys, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists version 3.5.21.40 as the first without the flaw, so updating CODESYS Control RTE (SL) to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.42% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update CODESYS Control RTE (SL) to 3.5.21.40 or a later version.
- Update CODESYS Control RTE (for Beckhoff CX) SL to 3.5.21.40 or a later version.
- Update CODESYS Control Win (SL) to 3.5.21.40 or a later version.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| CODESYS | CODESYS Control RTE (SL) | 3.5.18.0 up to, but not including, 3.5.21.40 | 3.5.21.40 |
| CODESYS | CODESYS Control RTE (for Beckhoff CX) SL | 3.5.18.0 up to, but not including, 3.5.21.40 | 3.5.21.40 |
| CODESYS | CODESYS Control Win (SL) | 3.5.18.0 up to, but not including, 3.5.21.40 | 3.5.21.40 |
| CODESYS | CODESYS HMI (SL) | 3.5.18.0 up to, but not including, 3.5.21.40 | 3.5.21.40 |
| CODESYS | CODESYS Remote Target Visu | 3.5.18.0 up to, but not including, 3.5.21.40 | 3.5.21.40 |
| CODESYS | CODESYS Runtime Toolkit | 3.5.18.0 up to, but not including, 3.5.21.40 | 3.5.21.40 |
| CODESYS | CODESYS Control for BeagleBone SL | 4.5.0.0 up to, but not including, 4.19.0.0 | 4.19.0.0 |
| CODESYS | CODESYS Control for emPC-A/iMX6 SL | 4.5.0.0 up to, but not including, 4.19.0.0 | 4.19.0.0 |
| CODESYS | CODESYS Control for IOT2000 SL | 4.5.0.0 up to, but not including, 4.19.0.0 | 4.19.0.0 |
| CODESYS | CODESYS Control for Linux ARM SL | 4.5.0.0 up to, but not including, 4.19.0.0 | 4.19.0.0 |
| CODESYS | CODESYS Control for Linux SL | 4.5.0.0 up to, but not including, 4.19.0.0 | 4.19.0.0 |
| CODESYS | CODESYS Control for PFC100 SL | 4.5.0.0 up to, but not including, 4.19.0.0 | 4.19.0.0 |
| CODESYS | CODESYS Control for PFC200 SL | 4.5.0.0 up to, but not including, 4.19.0.0 | 4.19.0.0 |
| CODESYS | CODESYS Control for PLCnext SL | 4.5.0.0 up to, but not including, 4.19.0.0 | 4.19.0.0 |
| CODESYS | CODESYS Control for Raspberry Pi SL | 4.5.0.0 up to, but not including, 4.19.0.0 | 4.19.0.0 |
| CODESYS | CODESYS Control for WAGO Touch Panels 600 SL | 4.5.0.0 up to, but not including, 4.19.0.0 | 4.19.0.0 |
| CODESYS | CODESYS Virtual Control SL | 4.5.0.0 up to, but not including, 4.19.0.0 | 4.19.0.0 |
| Codesys | Control For Beaglebone Sl | 4.5.0.0 up to, but not including, 4.19.0.0 | 4.19.0.0 |
| Codesys | Control For Empc-a/imx6 Sl | 4.5.0.0 through 4.19.0.0 | Not stated |
| Codesys | Control For Iot2000 Sl | 4.5.0.0 up to, but not including, 4.19.0.0 | 4.19.0.0 |
| Codesys | Control For Linux Arm Sl | 4.5.0.0 up to, but not including, 4.19.0.0 | 4.19.0.0 |
| Codesys | Control For Linux Sl | 4.5.0.0 up to, but not including, 4.19.0.0 | 4.19.0.0 |
| Codesys | Control For Pfc100 Sl | 4.5.0.0 through 4.19.0.0 | Not stated |
| Codesys | Control For Pfc200 Sl | 4.5.0.0 up to, but not including, 4.19.0.0 | 4.19.0.0 |
| Codesys | Control For Plcnext Sl | 4.5.0.0 up to, but not including, 4.19.0.0 | 4.19.0.0 |
Version data comes from the organisation that assigned the CVE; 9 further products are omitted here. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- NoneNo data is disclosed.
- Integrity
- NoneNothing can be modified.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. Scored by CNA (cert.vde.com).
Official description
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.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Access of Resource Using Incompatible Type
The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.
More Access of Resource Using Incompatible Type vulnerabilities (CWE-843)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
- certvde.com/de/advisories/VDE-2025-100Third Party Advisory
Other vulnerabilities in CODESYS Control RTE (SL)
- 7.5 High severity
- 8.1 High severity
- 7.5 High severity
- 8.8 High severity
- 7.5 High severity
- 8.8 High severity
Recent Access of Resource Using Incompatible Type vulnerabilities
- 8.8 High severity
- 8.8 High severity
- 8.8 High severity
- 8.8 High severity
- 8.8 High severity
- 8.8 High severity
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