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Codesys

12 CVEs product

Monthly

CVE-2025-41700 HIGH PATCH This Week

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.

RCE Deserialization Codesys
NVD
CVSS 3.1
7.8
EPSS
0.0%
CVE-2021-34596 MEDIUM This Month

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. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

Memory Corruption Information Disclosure 750 823 Firmware 750 829 Firmware 750 831 Firmware +27
NVD
CVSS 3.1
6.5
EPSS
0.8%
CVE-2021-34595 HIGH This Week

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. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

Buffer Overflow Memory Corruption 750 823 Firmware 750 829 Firmware 750 831 Firmware +27
NVD
CVSS 3.1
8.1
EPSS
0.9%
CVE-2021-34586 HIGH POC THREAT This Week

In the CODESYS V2 web server prior to V1.1.9.22 crafted web server requests may cause a Null pointer dereference in the CODESYS web server and may result in a denial-of-service condition. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Null Pointer Dereference Denial Of Service 750 823 Firmware 750 829 Firmware 750 831 Firmware +25
NVD
CVSS 3.1
7.5
EPSS
13.1%
CVE-2021-34585 HIGH POC This Week

In the CODESYS V2 web server prior to V1.1.9.22 crafted web server requests can trigger a parser error. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Denial Of Service 750 823 Firmware 750 829 Firmware 750 831 Firmware 750 832 Firmware +24
NVD
CVSS 3.1
7.5
EPSS
0.9%
CVE-2021-34584 CRITICAL POC Act Now

Crafted web server requests can be utilised to read partial stack or heap memory or may trigger a denial-of- service condition due to a crash in the CODESYS V2 web server prior to V1.1.9.22. Rated critical severity (CVSS 9.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Buffer Overflow 750 823 Firmware 750 829 Firmware 750 831 Firmware 750 832 Firmware +24
NVD
CVSS 3.1
9.1
EPSS
1.1%
CVE-2021-34583 HIGH POC This Week

Crafted web server requests may cause a heap-based buffer overflow and could therefore trigger a denial-of- service condition due to a crash in the CODESYS V2 web server prior to V1.1.9.22. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Buffer Overflow Heap Overflow 750 8214 Firmware 750 8216 Firmware 750 8217 Firmware +25
NVD
CVSS 3.1
7.5
EPSS
8.4%
CVE-2021-21869 HIGH POC PATCH This Week

An unsafe deserialization vulnerability exists in the Engine.plugin ProfileInformation ProfileData functionality of CODESYS GmbH CODESYS Development System 3.5.16 and 3.5.17. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. Public exploit code available.

Deserialization Codesys
NVD
CVSS 3.1
7.8
EPSS
1.8%
CVE-2021-21868 HIGH POC PATCH This Week

An unsafe deserialization vulnerability exists in the ObjectManager.plugin Project.get_MissingTypes() functionality of CODESYS GmbH CODESYS Development System 3.5.16 and 3.5.17. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. Public exploit code available.

Deserialization Codesys
NVD
CVSS 3.1
7.8
EPSS
1.6%
CVE-2021-21867 HIGH POC PATCH This Week

An unsafe deserialization vulnerability exists in the ObjectManager.plugin ObjectStream.ProfileByteArray functionality of CODESYS GmbH CODESYS Development System 3.5.16 and 3.5.17. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. Public exploit code available.

Deserialization Codesys
NVD
CVSS 3.1
7.8
EPSS
1.6%
CVE-2019-16265 CRITICAL Act Now

CODESYS V2.3 ENI server up to V3.2.2.24 has a Buffer Overflow. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Buffer Overflow Memory Corruption Eni Server Codesys
NVD
CVSS 3.1
9.8
EPSS
1.6%
CVE-2019-13538 HIGH This Week

3S-Smart Software Solutions GmbH CODESYS V3 Library Manager, all versions prior to 3.5.16.0, allows the system to display active library content without checking its validity, which may allow the. Rated high severity (CVSS 8.6), this vulnerability is no authentication required, low attack complexity. No vendor patch available.

XSS Codesys
NVD
CVSS 3.1
8.6
EPSS
0.9%
EPSS 0% CVSS 7.8
HIGH PATCH This Week

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.

RCE Deserialization Codesys
NVD
EPSS 1% CVSS 6.5
MEDIUM This Month

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. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

Memory Corruption Information Disclosure 750 823 Firmware +29
NVD
EPSS 1% CVSS 8.1
HIGH This Week

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. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

Buffer Overflow Memory Corruption 750 823 Firmware +29
NVD
EPSS 13% CVSS 7.5
HIGH POC THREAT This Week

In the CODESYS V2 web server prior to V1.1.9.22 crafted web server requests may cause a Null pointer dereference in the CODESYS web server and may result in a denial-of-service condition. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Null Pointer Dereference Denial Of Service 750 823 Firmware +27
NVD
EPSS 1% CVSS 7.5
HIGH POC This Week

In the CODESYS V2 web server prior to V1.1.9.22 crafted web server requests can trigger a parser error. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Denial Of Service 750 823 Firmware 750 829 Firmware +26
NVD
EPSS 1% CVSS 9.1
CRITICAL POC Act Now

Crafted web server requests can be utilised to read partial stack or heap memory or may trigger a denial-of- service condition due to a crash in the CODESYS V2 web server prior to V1.1.9.22. Rated critical severity (CVSS 9.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Buffer Overflow 750 823 Firmware 750 829 Firmware +26
NVD
EPSS 8% CVSS 7.5
HIGH POC This Week

Crafted web server requests may cause a heap-based buffer overflow and could therefore trigger a denial-of- service condition due to a crash in the CODESYS V2 web server prior to V1.1.9.22. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Buffer Overflow Heap Overflow 750 8214 Firmware +27
NVD
EPSS 2% CVSS 7.8
HIGH POC PATCH This Week

An unsafe deserialization vulnerability exists in the Engine.plugin ProfileInformation ProfileData functionality of CODESYS GmbH CODESYS Development System 3.5.16 and 3.5.17. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. Public exploit code available.

Deserialization Codesys
NVD
EPSS 2% CVSS 7.8
HIGH POC PATCH This Week

An unsafe deserialization vulnerability exists in the ObjectManager.plugin Project.get_MissingTypes() functionality of CODESYS GmbH CODESYS Development System 3.5.16 and 3.5.17. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. Public exploit code available.

Deserialization Codesys
NVD
EPSS 2% CVSS 7.8
HIGH POC PATCH This Week

An unsafe deserialization vulnerability exists in the ObjectManager.plugin ObjectStream.ProfileByteArray functionality of CODESYS GmbH CODESYS Development System 3.5.16 and 3.5.17. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. Public exploit code available.

Deserialization Codesys
NVD
EPSS 2% CVSS 9.8
CRITICAL Act Now

CODESYS V2.3 ENI server up to V3.2.2.24 has a Buffer Overflow. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Buffer Overflow Memory Corruption Eni Server +1
NVD
EPSS 1% CVSS 8.6
HIGH This Week

3S-Smart Software Solutions GmbH CODESYS V3 Library Manager, all versions prior to 3.5.16.0, allows the system to display active library content without checking its validity, which may allow the. Rated high severity (CVSS 8.6), this vulnerability is no authentication required, low attack complexity. No vendor patch available.

XSS Codesys
NVD

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