CODESYS Vulnerabilities Allow Code Execution and DoS
Summary
CERT-Bund has issued a security advisory for CODESYS, detailing multiple vulnerabilities that could allow attackers to execute arbitrary code or cause a denial of service. The advisory affects CODESYS versions prior to 3.5.22.0 and 4.21.0.0.
What changed
CERT-Bund has released a security advisory (WID-SEC-2026-0832) concerning multiple critical vulnerabilities in CODESYS software, versions prior to 3.5.22.0 and 4.21.0.0. These vulnerabilities, with a CVSS Base Score of 8.8, can be exploited remotely to execute arbitrary code or perform denial-of-service attacks. The advisory indicates that mitigation measures are available.
Organizations utilizing affected CODESYS versions in industrial automation environments should immediately review their systems. It is recommended to apply available patches or mitigation strategies provided by CODESYS to address these vulnerabilities. Failure to do so could result in significant operational disruption and security breaches.
What to do next
- Review CODESYS installations for affected versions (<3.5.22.0 and <4.21.0.0).
- Apply available patches or mitigation strategies from CODESYS.
- Assess potential impact of exploitation on industrial control systems.
Archived snapshot
Mar 24, 2026GovPing captured this document from the original source. If the source has since changed or been removed, this is the text as it existed at that time.
[WID-SEC-2026-0832] CODESYS: Mehrere Schwachstellen CVSS Base Score 8.8 (hoch) CVSS Temporal Score 7.7 (hoch) Remoteangriff ja Datum 23.03.2026 Stand 24.03.2026 Mitigation ja
Betroffene Systeme
Betriebssystem
- Sonstiges
Produktbeschreibung
CODESYS ist eine herstellerunabhängige Automatisierungssoftware für die Entwicklung von Steuerungsanwendungen in der industriellen Automatisierung.
Produkte
23.03.2026
- CODESYS CODESYS <3.5.22.0
- CODESYS CODESYS <4.21.0.0
Angriff
Angriff
Ein Angreifer kann mehrere Schwachstellen in CODESYS ausnutzen, um beliebigen Programmcode auszuführen, und um einen Denial of Service Angriff durchzuführen. CVE Informationen Versionshistorie Feedback zum Advisory geben
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Source
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