Service interruption via crafted communication requests
Published Aug 4, 2025 · Updated Aug 4, 2025
Affected CODESYS Control runtimes allow remote attackers to interrupt PLC service through crafted unauthenticated communication requests. The CmpDevice component dereferences a NULL pointer while processing the requests, including login attempts from outdated CODESYS clients. Only Runtime Toolkit PLCs containing CmpDevice, CmpAuditLog, and CmpSessionInformation expose the affected path, and exploitation disrupts control-system service.
Summary
What happened
Affected CODESYS Control runtimes allow remote attackers to interrupt PLC service through crafted unauthenticated communication requests. The CmpDevice component dereferences a NULL pointer while processing the requests, including login attempts from outdated CODESYS clients. Only Runtime Toolkit PLCs containing CmpDevice, CmpAuditLog, and CmpSessionInformation expose the affected path, and exploitation disrupts control-system service.
The record
- CVE
- CVE-2025-41691
- Published
- Aug 4, 2025
- Updated
- Aug 4, 2025
- Vendor
- CODESYS GmbH
- Product
- CODESYS Control for BeagleBone SL
- Classifications
- CWE-476, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 4, 2025CVE publishedPublication date reported by the CVE source.
- Aug 4, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=4.16.0.0 <4.17.0.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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