Codesys Runtime Toolkit vulnerabilities

CVE-2025-41738 [HIGH] CWE-843 CVE-2025-41738: An unauthenticated remote attacker may cause the visualisation server of the CODESYS Control runtime An unauthenticated remote attacker may cause the visualisation server of the CODESYS Control runtime system to access a resource with a pointer of wrong type, potentially leading to a denial-of-service (DoS) condition.

CVE-2025-41659 [HIGH] CWE-732 CVE-2025-41659: A low-privileged attacker can remotely access the PKI folder of the CODESYS Control runtime system a A low-privileged attacker can remotely access the PKI folder of the CODESYS Control runtime system and thus read and write certificates and its keys. This allows sensitive data to be extracted or to accept certificates as trusted. Although all services remain available, only unencrypted communication is possible if the certificates are deleted.

CVE-2025-41658 [MEDIUM] CWE-276 CVE-2025-41658: CODESYS Runtime Toolkit-based products may expose sensitive files to local low-privileged operating CODESYS Runtime Toolkit-based products may expose sensitive files to local low-privileged operating system users due to default file permissions.

CVE-2023-6357 [HIGH] CWE-78 CVE-2023-6357: A low-privileged remote attacker could exploit the vulnerability and inject additional system comman A low-privileged remote attacker could exploit the vulnerability and inject additional system commands via file system libraries which could give the attacker full control of the device.

CVE-2022-4224 [HIGH] CWE-1188 CVE-2022-4224: In multiple products of CODESYS v3 in multiple versions a remote low privileged user could utilize t 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-2022-31806 [CRITICAL] CWE-1188 CVE-2022-31806: In CODESYS V2 PLCWinNT and Runtime Toolkit 32 in versions prior to V2.4.7.57 password protection is In CODESYS V2 PLCWinNT and Runtime Toolkit 32 in versions prior to V2.4.7.57 password protection is not enabled by default and there is no information or prompt to enable password protection at login in case no password is set at the controller.

CVE-2022-1965 [HIGH] CWE-755 CVE-2022-1965: Multiple products of CODESYS implement a improper error handling. A low privilege remote attacker ma Multiple products of CODESYS implement a improper error handling. A low privilege remote attacker may craft a request, which is not properly processed by the error handling. In consequence, the file referenced by the request could be deleted. User interaction is not required.

CVE-2022-31805 [HIGH] CWE-523 CVE-2022-31805: In the CODESYS Development System multiple components in multiple versions transmit the passwords fo In the CODESYS Development System multiple components in multiple versions transmit the passwords for the communication between clients and servers unprotected.

CVE-2022-32138 [HIGH] CWE-194 CVE-2022-32138: In multiple CODESYS products, a remote attacker may craft a request which may cause an unexpected si In multiple CODESYS products, a remote attacker may craft a request which may cause an unexpected sign extension, resulting in a denial-of-service condition or memory overwrite.

CVE-2022-32143 [HIGH] CWE-552 CVE-2022-32143: In multiple CODESYS products, file download and upload function allows access to internal files in t In multiple CODESYS products, file download and upload function allows access to internal files in the working directory e.g. firmware files of the PLC. All requests are processed on the controller only if no level 1 password is configured on the controller or if remote attacker has previously successfully authenticated himself to the controller. A su

CVE-2022-32142 [HIGH] CWE-823 CVE-2022-32142: Multiple CODESYS Products are prone to a out-of bounds read or write access. A low privileged remote Multiple CODESYS Products are prone to a out-of bounds read or write access. A low privileged remote attacker may craft a request with invalid offset, which can cause an out-of-bounds read or write access, resulting in denial-of-service condition or local memory overwrite, which can lead to a change of local files. User interaction is not required.

CVE-2022-32137 [HIGH] CWE-122 CVE-2022-32137: In multiple CODESYS products, a low privileged remote attacker may craft a request, which may cause In multiple CODESYS products, a low privileged remote attacker may craft a request, which may cause a heap-based buffer overflow, resulting in a denial-of-service condition or memory overwrite. User interaction is not required.

CVE-2022-32141 [MEDIUM] CWE-126 CVE-2022-32141: Multiple CODESYS Products are prone to a buffer over read. A low privileged remote attacker may craf Multiple CODESYS Products are prone to a buffer over read. A low privileged remote attacker may craft a request with an invalid offset, which can cause an internal buffer over-read, resulting in a denial-of-service condition. User interaction is not required.

CVE-2022-32140 [MEDIUM] CWE-120 CVE-2022-32140: Multiple CODESYS products are affected to a buffer overflow.A low privileged remote attacker may cra Multiple CODESYS products are affected to a buffer overflow.A low privileged remote attacker may craft a request, which can cause a buffer copy without checking the size of the service, resulting in a denial-of-service condition. User Interaction is not required.

CVE-2022-32139 [MEDIUM] CWE-125 CVE-2022-32139: In multiple CODESYS products, a low privileged remote attacker may craft a request, which cause an o In multiple CODESYS products, a low privileged remote attacker may craft a request, which cause an out-of-bounds read, resulting in a denial-of-service condition. User Interaction is not required.

CVE-2022-32136 [MEDIUM] CWE-824 CVE-2022-32136: In multiple CODESYS products, a low privileged remote attacker may craft a request that cause a read In multiple CODESYS products, a low privileged remote attacker may craft a request that cause a read access to an uninitialized pointer, resulting in a denial-of-service. User interaction is not required.

CVE-2021-34595 [HIGH] CWE-823 CVE-2021-34595: A crafted request with invalid offsets may cause an out-of-bounds read or write access in CODESYS V2 A crafted request with invalid offsets may cause an out-of-bounds read or write access in CODESYS V2 Runtime Toolkit 32 Bit full and PLCWinNT prior to versions V2.4.7.56, resulting in a denial-of-service condition or local memory overwrite.

CVE-2021-34593 [HIGH] CWE-755 CVE-2021-34593: In CODESYS V2 Runtime Toolkit 32 Bit full and PLCWinNT prior to versions V2.4.7.56 unauthenticated c In CODESYS V2 Runtime Toolkit 32 Bit full and PLCWinNT prior to versions V2.4.7.56 unauthenticated crafted invalid requests may result in several denial-of-service conditions. Running PLC programs may be stopped, memory may be leaked, or further communication clients may be blocked from accessing the PLC.

CVE-2021-34596 [MEDIUM] CWE-824 CVE-2021-34596: A crafted request may cause a read access to an uninitialized pointer in CODESYS V2 Runtime Toolkit A crafted request may cause a read access to an uninitialized pointer in CODESYS V2 Runtime Toolkit 32 Bit full and PLCWinNT prior to versions V2.4.7.56, resulting in a denial-of-service condition.

CVE-2021-33486 [HIGH] CWE-755 CVE-2021-33486: All versions of the CODESYS V3 Runtime Toolkit for VxWorks from version V3.5.8.0 and before version All versions of the CODESYS V3 Runtime Toolkit for VxWorks from version V3.5.8.0 and before version V3.5.17.10 have Improper Handling of Exceptional Conditions.