Codesys Runtime Toolkit vulnerabilities

9 CVEs affecting Codesys Runtime Toolkit, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2026-8047, published 2026-05-26.

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Known exploited (CISA KEV) first, then by EPSS exploit probability.

• CVE-2025-1468, published 2025-03-18. High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days. An unauthenticated remote attacker can gain access to sensitive information including authentication information when using CODESYS OPC UA Server with the non-default Basic128Rsa15 security policy.
• CVE-2024-8175, published 2024-09-25. High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days. An unauthenticated remote attacker can causes the CODESYS web server to access invalid memory which results in a DoS.
• CVE-2026-8047, published 2026-05-26. High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days. The affected products perform improper length checking when parsing incoming HTTP requests, resulting in a size-limited out-of-bounds write. An unauthenticated remote attacker can exploit this flaw…
• CVE-2026-3509, published 2026-03-24. High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days. An unauthenticated remote attacker may be able to control the format string of messages processed by the Audit Log of the CODESYS Control runtime system, potentially resulting in a denial‑of‑service…
• CVE-2024-5000, published 2024-06-04. High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days. An unauthenticated remote attacker can use a malicious OPC UA client to send a crafted request to affected CODESYS products which can cause a DoS due to incorrect calculation of buffer size.
• CVE-2026-8046, published 2026-05-26. High severity, CVSS 8.1. EPSS: 0.5% chance of exploitation in the next 30 days. The affected products insufficiently verify authorization when deleting user accounts. An authenticated, low-privileged remote user can exploit this vulnerability to delete other users, including…
• CVE-2025-41660, published 2026-03-24. High severity, CVSS 8.8. EPSS: 0.4% chance of exploitation in the next 30 days. A low-privileged remote attacker may be able to replace the boot application of the CODESYS Control runtime system, enabling unauthorized code execution.
• CVE-2025-41739, published 2025-12-01. Medium severity, CVSS 5.9. EPSS: 0.3% chance of exploitation in the next 30 days. An unauthenticated remote attacker, who beats a race condition, can exploit a flaw in the communication servers of the CODESYS Control runtime system on Linux and QNX to trigger an out-of-bounds read…
• CVE-2025-0694, published 2025-03-18. Medium severity, CVSS 6.6. EPSS: 0.3% chance of exploitation in the next 30 days. Insufficient path validation in CODESYS Control allows low privileged attackers with physical access to gain full filesystem access.