CVE-2025-41691
CODESYS Control DoS via Unauthenticated NULL Pointer Dereference
Description
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.
INFO
Published Date :
Aug. 4, 2025, 8:15 a.m.
Last Modified :
June 17, 2026, 9:22 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2025-41691
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update CODESYS Control to the latest version.
- Apply vendor patches for runtime systems.
- Restrict network access to CODESYS.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-41691.
| URL | Resource |
|---|---|
| https://certvde.com/de/advisories/VDE-2025-070 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-41691 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-41691
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-41691 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-41691 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'CODESYS', 'product': 'Control RTE (SL)', 'versions': [{'status': 'affected', 'version': '3.5.21.10', 'lessThan': '3.5.21.20', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'CODESYS', 'product': 'Control RTE (for Beckhoff CX) SL', 'versions': [{'status': 'affected', 'version': '3.5.21.10', 'lessThan': '3.5.21.20', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'CODESYS', 'product': 'Control Win (SL)', 'versions': [{'status': 'affected', 'version': '3.5.21.10', 'lessThan': '3.5.21.20', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'CODESYS', 'product': 'HMI (SL)', 'versions': [{'status': 'affected', 'version': '3.5.21.10', 'lessThan': '3.5.21.20', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'CODESYS', 'product': 'Control for BeagleBone SL', 'versions': [{'status': 'affected', 'version': '4.16.0.0', 'lessThan': '4.17.0.0', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'CODESYS', 'product': 'Control for emPC-A/iMX6 SL', 'versions': [{'status': 'affected', 'version': '4.16.0.0', 'lessThan': '4.17.0.0', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'CODESYS', 'product': 'Control for IOT2000 SL', 'versions': [{'status': 'affected', 'version': '4.16.0.0', 'lessThan': '4.17.0.0', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'CODESYS', 'product': 'Control for Linux ARM SL', 'versions': [{'status': 'affected', 'version': '4.16.0.0', 'lessThan': '4.17.0.0', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'CODESYS', 'product': 'Control for Linux SL', 'versions': [{'status': 'affected', 'version': '4.16.0.0', 'lessThan': '4.17.0.0', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'CODESYS', 'product': 'Control for PFC100 SL', 'versions': [{'status': 'affected', 'version': '4.16.0.0', 'lessThan': '4.17.0.0', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'CODESYS', 'product': 'Control for PFC200 SL', 'versions': [{'status': 'affected', 'version': '4.16.0.0', 'lessThan': '4.17.0.0', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'CODESYS', 'product': 'Control for PLCnext SL', 'versions': [{'status': 'affected', 'version': '4.16.0.0', 'lessThan': '4.17.0.0', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'CODESYS', 'product': 'Control for Raspberry Pi SL', 'versions': [{'status': 'affected', 'version': '4.16.0.0', 'lessThan': '4.17.0.0', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'CODESYS', 'product': 'Control for WAGO Touch Panels 600 SL', 'versions': [{'status': 'affected', 'version': '4.16.0.0', 'lessThan': '4.17.0.0', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'CODESYS', 'product': 'Virtual Control SL', 'versions': [{'status': 'affected', 'version': '4.16.0.0', 'lessThan': '4.17.0.0', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2025-41691', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2025-08-04T16:28:09.392670Z'} -
New CVE Received by [email protected]
Aug. 04, 2025
Action Type Old Value New Value Added Description 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-476 Added Reference https://certvde.com/de/advisories/VDE-2025-070