Codesys Gateway vulnerabilities

20 CVEs affecting Codesys Gateway, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2026-76992, 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-2019-9010, published 2019-08-15. Critical severity, CVSS 9.8. EPSS: 1.9% chance of exploitation in the next 30 days. An issue was discovered in 3S-Smart CODESYS V3 products. The CODESYS Gateway does not correctly verify the ownership of a communication channel. All variants of the following CODESYS V3 products in…
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-2019-9012, published 2019-08-15. High severity, CVSS 7.5. EPSS: 1.8% chance of exploitation in the next 30 days. An issue was discovered in 3S-Smart CODESYS V3 products. A crafted communication request may cause uncontrolled memory allocations in the affected CODESYS products and may result in a…
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-2021-29241, published 2021-05-03. High severity, CVSS 7.5. EPSS: 1.4% chance of exploitation in the next 30 days. CODESYS Gateway 3 before 3.5.16.70 has a NULL pointer dereference that may result in a denial of service (DoS).
CVE-2022-22517, published 2022-04-07. High severity, CVSS 7.5. EPSS: 1.3% chance of exploitation in the next 30 days. An unauthenticated, remote attacker can disrupt existing communication channels between CODESYS products by guessing a valid channel ID and injecting packets. This results in the communication…
CVE-2022-31802, published 2022-06-24. Critical severity, CVSS 9.8. EPSS: 1.3% chance of exploitation in the next 30 days. In CODESYS Gateway Server V2 for versions prior to V2.3.9.38 only a part of the the specified password is been compared to the real CODESYS Gateway password. An attacker may perform authentication by…
CVE-2022-31804, published 2022-06-24. High severity, CVSS 7.5. EPSS: 1.1% chance of exploitation in the next 30 days. The CODESYS Gateway Server V2 does not verifiy that the size of a request is within expected limits. An unauthenticated attacker may allocate an arbitrary amount of memory, which may lead to a crash…

Latest

CVE-2026-76992, published 2026-09-30. High severity, CVSS 7.5. EPSS: 0.3% chance of exploitation in the next 30 days. The CODESYS Gateway Client allocates memory based on a size field in a gateway response without enforcing an appropriate upper limit. An unauthenticated remote attacker controlling a malicious…
CVE-2023-5751, published 2024-06-04. High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days. A local attacker with low privileges can read and modify any users files and cause a DoS in the working directory of the affected products due to exposure of resource to wrong sphere.
CVE-2022-30792, published 2022-07-11. High severity, CVSS 7.5. EPSS: 0.9% chance of exploitation in the next 30 days. In CmpChannelServer of CODESYS V3 in multiple versions an uncontrolled ressource consumption allows an unauthorized attacker to block new communication channel connections. Existing connections are…
CVE-2022-30791, published 2022-07-11. High severity, CVSS 7.5. EPSS: 0.9% chance of exploitation in the next 30 days. In CmpBlkDrvTcp of CODESYS V3 in multiple versions an uncontrolled ressource consumption allows an unauthorized attacker to block new TCP connections. Existing connections are not affected.
CVE-2022-31805, published 2022-06-24. High severity, CVSS 7.5. EPSS: 1% chance of exploitation in the next 30 days. In the CODESYS Development System multiple components in multiple versions transmit the passwords for the communication between clients and servers unprotected.
CVE-2022-31803, published 2022-06-24. Medium severity, CVSS 5.3. EPSS: 1.1% chance of exploitation in the next 30 days. In CODESYS Gateway Server V2 an insufficient check for the activity of TCP client connections allows an unauthenticated attacker to consume all available TCP connections and prevent legitimate users…
CVE-2022-22514, published 2022-04-07. High severity, CVSS 7.1. EPSS: 0.9% chance of exploitation in the next 30 days. An authenticated, remote attacker can gain access to a dereferenced pointer contained in a request. The accesses can subsequently lead to local overwriting of memory in the CmpTraceMgr, whereby the…