Vendor
CODESYS
104 known vulnerabilities.
CODESYS at a glance
- Last 12 months
- 16
- Critical · all time
- 3
- Exploited · all time
- 0
- Public exploit · all time
- 0
Show as table
| Month | Vulnerabilities | Critical |
|---|---|---|
| Nov 2026 | 0 | 0 |
| Oct 2026 | 0 | 0 |
| Sep 2026 | 2 | 0 |
| Aug 2026 | 0 | 0 |
| Jul 2026 | 1 | 0 |
| Jun 2026 | 0 | 0 |
| May 2026 | 6 | 0 |
| Apr 2026 | 1 | 0 |
| Mar 2026 | 3 | 0 |
| Feb 2026 | 0 | 0 |
| Jan 2026 | 0 | 0 |
| Dec 2025 | 3 | 0 |
| Nov 2025 | 0 | 0 |
| Oct 2025 | 0 | 0 |
| Sep 2025 | 0 | 0 |
| Aug 2025 | 3 | 0 |
| Jul 2025 | 0 | 0 |
| Jun 2025 | 0 | 0 |
| May 2025 | 0 | 0 |
| Apr 2025 | 1 | 0 |
| Mar 2025 | 3 | 0 |
| Feb 2025 | 0 | 0 |
| Jan 2025 | 0 | 0 |
| Dec 2024 | 0 | 0 |
Most common weaknesses
Products
Latest advisories
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High max 8.1WID-SEC-2026-3710 2 CVEs
CODESYS Control Runtime und Gateway Client: Mehrere Schwachstellen
Ein Angreifer kann mehrere Schwachstellen in CODESYS Control Runtime und Gateway Client ausnutzen, um Daten zu manipulieren und einen Denial-of-Service-Zustand herbeizuführen.
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Medium max 7.5WID-SEC-2026-3688 1 CVE
CODESYS Gateway Client: Schwachstelle ermöglicht Denial of Service
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in CODESYS Gateway Client ausnutzen, um einen Denial of Service Angriff durchzuführen.
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Medium max 7.8
CODESYS Control und Development System: Mehrere Schwachstellen
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in CODESYS Control und Development System ausnutzen, um beliebigen Programmcode mit Benutzerrechten auszuführen oder einen Denial of Service zu verursachen.
first Nov 30, 2025 -
Medium max 6.5WID-SEC-2026-2555 1 CVE
CODESYS: Schwachstelle ermöglicht Denial of Service
Ein Angreifer aus einem angrenzenden Netzwerk kann eine Schwachstelle in CODESYS ausnutzen, um einen Denial of Service Angriff durchzuführen.
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High max 8.1
CODESYS: Mehrere Schwachstellen
Ein Angreifer kann mehrere Schwachstellen in CODESYS ausnutzen, um seine Privilegien zu erhöhen, um Daten zu manipulieren, und um einen Denial of Service Angriff durchzuführen.
first May 25, 2026
104 results · Feed
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High 7.5
Uncontrolled Memory Allocation in CODESYS Gateway Client
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 gateway can exploit this behavior to trigger excessive memory cons…
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High 8.1
Improper Synchronization in Monitoring in CODESYS Control Runtime
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 internal memory structures. An authenticated remote attacke…
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Medium 6.5
Out-of-bounds Write in CODESYS PROFINET Controller
An out‑of‑bounds write vulnerability in the CODESYS PROFINET Controller allows an unauthenticated attacker on the same network segment to send malformed PROFINET communication data that triggers an exception in the affected PLC application. The exception is h…
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High 7.5
Out-of-bounds Write in CODESYS Control
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 to cause a denial of service via a system crash on the affect…
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High 8.1
Incorrect Authorization in CODESYS Control
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 those with higher privileges.
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High 7.8
Incorrect Default Permissions in CODESYS Development System
The affected product extracts installation files to a temporary directory with incorrect default permissions during administrative installation. A low-privileged local attacker can exploit a TOCTOU race condition with a practical time window to replace verifi…
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High 7.8
Incorrect Default Permissions in CODESYS Development System
The affected product creates a directory with insecure default permissions during administrative installation. This allows a low-privileged local attacker to modify a temporary file defining the components to be installed, enabling local privilege escalation …
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Medium 6.9
CODESYS Visualization - Insufficiently Protected Credentials
The affected product may expose credentials remotely between low privileged visualization users during concurrent login operations due to insufficient isolation of authentication data. The vulnerability affects only login operations within an active visualiza…
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High 8.2
Improper resource management in CODESYS Modbus TCP Server
An unauthenticated remote attacker may exhaust all available TCP connections in the CODESYS Modbus TCP Server stack if a race condition in connection handling is successfully exploited, preventing legitimate clients from establishing new connections.
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High 8.7
Improper timeout handling in CODESYS EtherNetIP
An unauthenticated remote attacker is able to exhaust all available TCP connections in the CODESYS EtherNet/IP adapter stack, preventing legitimate clients from establishing new connections.
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High 7.5
CODESYS Control Audit Log Format String DoS
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 (DoS) condition.
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High 8.8
CODESYS Control Boot Application Replacement Enables Code Execution
A low-privileged remote attacker may be able to replace the boot application of the CODESYS Control runtime system, enabling unauthorized code execution.
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High 7.3
CODESYS Installer TOCTOU Privilege Escalation
If a legitimate user confirms a self-update prompt or initiate an installation of a CODESYS Development System, a low privileged local attacker can gain elevated rights due to a TOCTOU vulnerability in the CODESYS installer.
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High 7.8
CODESYS Development System - Deserialization of Untrusted Data
An unauthenticated attacker can trick a local user into executing arbitrary code by opening a deliberately manipulated CODESYS project file with a CODESYS development system. This arbitrary code is executed in the user context.
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High 7.5
CODESYS Control - Invalid type usage in visualization
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.
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Medium 5.9
CODESYS Control - Linux/QNX SysSocket flaw
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 via crafted socket communication, potentially causing a den…
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High 7.5
CODESYS Control DoS via Unauthenticated NULL Pointer Dereference
An unauthenticated remote attacker may trigger a NULL pointer dereference in the affected CODESYS Control runtime systems by sending specially crafted communication requests, potentially leading to a denial-of-service (DoS) condition.
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High 8.3
CODESYS Control PKI Exposure Enables Remote Certificate Access
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…
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Medium 5.5
CODESYS Toolkit Exposes Sensitive Files via Default Permissions
CODESYS Runtime Toolkit-based products may expose sensitive files to local low-privileged operating system users due to default file permissions.
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Medium 5.3
Forced Browsing Vulnerability in CODESYS Visualization
An unauthenticated remote attacker can bypass the user management in CODESYS Visualization and read visualization template files or static elements by means of forced browsing.
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Medium 5.3
CODESYS (Edge) Gateway for Windows insecure default
An unauthenticated remote attacker can gain limited information of the PLC network but the user management of the PLCs prevents the actual access to the PLCs.
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Medium 6.6
CODESYS Control V3 removable media path traversal
Insufficient path validation in CODESYS Control allows low privileged attackers with physical access to gain full filesystem access.
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High 7.5
CODESYS Control V3 - OPC UA Server Authentication bypass
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.
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High 7.5
CODESYS: web server vulnerable to DoS
An unauthenticated remote attacker can causes the CODESYS web server to access invalid memory which results in a DoS.
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Medium 4.4
Out-of-bounds read in OSCAT-Library
Out-of-Bounds read vulnerability in OSCAT Basic Library allows an local, unprivileged attacker to access limited internal data of the PLC which may lead to a crash of the affected service.
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High 7.8
CODESYS: Development system prone to DoS through exposure of resource to wrong sphere
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.
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High 7.5
CODESYS: Incorrect calculation of buffer size can cause DoS on CODESYS OPC UA products
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.
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Medium 5.5
CODESYS: Use after free vulnerability through corrupted project files
An unauthenticated local attacker may trick a user to open corrupted project files to crash the system due to use after free vulnerability.
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High 7.8
CODESYS: Out-of-bounds write through corrupted project files
An unauthenticated local attacker may trick a user to open corrupted project files to execute arbitrary code or crash the system due to an out-of-bounds write vulnerability.
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High 8.8
OS Command Injection in multiple CODESYS products
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.
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High 8.8
CODESYS: Improper memory restrictions fro CODESYS Control
In CODESYS Control in multiple versions a improper restriction of operations within the bounds of a memory buffer allow an remote attacker with user privileges to gain full access of the device.
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Low 3.3
CODESYS: Missing Brute-Force protection in CODESYS Development System
A missing Brute-Force protection in CODESYS Development System prior to 3.5.19.20 allows a local attacker to have unlimited attempts of guessing the password within an import dialog.
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Medium 6.5
CODESYS Improper Validation of Consistency within Input in multiple products
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 component to read internally from an invalid address, potentially …
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Medium 6.5
CODESYS Improper Validation of Consistency within Input in multiple products
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 component to read internally from an invalid address, potentially …
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Medium 6.5
CODESYS Heap-based Buffer Overflow in multiple products
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 buffer, which can lead to a denial-of-service condition.
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Medium 6.5
CODESYS Improper Input Validation in CmpAppBP
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 component to read internally from an invalid address, potentially le…
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Medium 6.5
CODESYS Improper Input Validation in CmpAppBP
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 component to read internally from an invalid address, potentially le…
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Medium 6.5
CODESYS Improper Input Validation in CmpAppBP
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 component to read internally from an invalid address, potentially le…
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Medium 6.5
CODESYS Improper Input Validation in CmpAppBP
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 component to read internally from an invalid address, potentially le…
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Medium 6.5
CODESYS Improper Input Validation in CmpAppBP
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 component to read internally from an invalid address, potentially le…