Codesys Safety SIL2 vulnerabilities

21 CVEs affecting Codesys Safety SIL2, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2026-79625, published 2026-09-30.

Highest priority

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

CVE-2018-20026, published 2019-02-19. High severity, CVSS 7.5. EPSS: 3% chance of exploitation in the next 30 days. Improper Communication Address Filtering exists in CODESYS V3 products versions prior V3.5.14.0.
CVE-2018-20025, published 2019-02-19. High severity, CVSS 7.5. EPSS: 2.6% chance of exploitation in the next 30 days. Use of Insufficiently Random Values exists in CODESYS V3 products versions prior V3.5.14.0.
CVE-2020-7052, published 2020-01-24. Medium severity, CVSS 6.5. EPSS: 1.9% chance of exploitation in the next 30 days. CODESYS Control V3, Gateway V3, and HMI V3 before 3.5.15.30 allow uncontrolled memory allocation which can result in a remote denial of service condition.
CVE-2019-9009, published 2019-09-17. High severity, CVSS 7.5. EPSS: 1.7% chance of exploitation in the next 30 days. An issue was discovered in 3S-Smart CODESYS before 3.5.15.0 . Crafted network packets cause the Control Runtime to crash.
CVE-2022-4224, published 2023-03-23. High severity, CVSS 8.8. EPSS: 0.9% chance of exploitation in the next 30 days. In multiple products of CODESYS v3 in multiple versions a remote low privileged user could utilize this vulnerability to read and modify system files and OS resources or DoS the device.
CVE-2023-37559, published 2023-08-03. Medium severity, CVSS 6.5. EPSS: 0.6% chance of exploitation in the next 30 days. After successful authentication as a user in multiple Codesys products in multiple versions, specific crafted network communication requests with inconsistent content can cause the CmpAppForce…
CVE-2023-37558, published 2023-08-03. Medium severity, CVSS 6.5. EPSS: 0.6% chance of exploitation in the next 30 days. After successful authentication as a user in multiple Codesys products in multiple versions, specific crafted network communication requests with inconsistent content can cause the CmpAppForce…
CVE-2023-37557, published 2023-08-03. Medium severity, CVSS 6.5. EPSS: 0.6% chance of exploitation in the next 30 days. After successful authentication as a user in multiple Codesys products in multiple versions, specific crafted remote communication requests can cause the CmpAppBP component to overwrite a heap-based…
CVE-2023-37556, published 2023-08-03. Medium severity, CVSS 6.5. EPSS: 0.6% chance of exploitation in the next 30 days. In multiple versions of multiple Codesys products, after successful authentication as a user, specific crafted network communication requests with inconsistent content can cause the CmpAppBP…
CVE-2023-37555, published 2023-08-03. Medium severity, CVSS 6.5. EPSS: 0.6% chance of exploitation in the next 30 days. In multiple versions of multiple Codesys products, after successful authentication as a user, specific crafted network communication requests with inconsistent content can cause the CmpAppBP…

Latest

CVE-2026-79625, published 2026-09-30. High severity, CVSS 8.1. EPSS: 0.2% chance of exploitation in the next 30 days. Affected products do not properly synchronize access to their monitoring functionality. When multiple clients send concurrent requests, this may lead to incorrect reads or writes, or to corruption of…
CVE-2023-37554, published 2023-08-03. Medium severity, CVSS 6.5. EPSS: 0.6% chance of exploitation in the next 30 days. In multiple versions of multiple Codesys products, after successful authentication as a user, specific crafted network communication requests with inconsistent content can cause the CmpAppBP…
CVE-2023-37553, published 2023-08-03. Medium severity, CVSS 6.5. EPSS: 0.6% chance of exploitation in the next 30 days. In multiple versions of multiple Codesys products, after successful authentication as a user, specific crafted network communication requests with inconsistent content can cause the CmpAppBP…
CVE-2023-37552, published 2023-08-03. Medium severity, CVSS 6.5. EPSS: 0.6% chance of exploitation in the next 30 days. In multiple versions of multiple Codesys products, after successful authentication as a user, specific crafted network communication requests with inconsistent content can cause the CmpAppBP…
CVE-2023-37551, published 2023-08-03. Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days. In multiple Codesys products in multiple versions, after successful authentication as a user, specially crafted network communication requests can utilize the CmpApp component to download files with…