Description
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.
Published: 2021-10-26
Score: 8.1 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

No analysis available yet.

Remediation

Vendor Solution

CODESYS GmbH has released the following product versions to solve the noted vulnerability issue for the affected CODESYS products: * CODESYS Runtime Toolkit 32 bit full version V2.4.7.56 * CODESYS PLCWinNT version V2.4.7.56. This will also be part of the CODESYS Development System setup version V2.3.9.68.

Tracking

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Advisories
Source ID Title
EUVD EUVD EUVD-2021-21245 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.
History

Fri, 15 Aug 2025 20:30:00 +0000

Type Values Removed Values Added
First Time appeared Codesys codesys
Wago
Wago 750-8202
Wago 750-8202 Firmware
Wago 750-8203
Wago 750-8203 Firmware
Wago 750-8204
Wago 750-8204 Firmware
Wago 750-8206
Wago 750-8206 Firmware
Wago 750-8207
Wago 750-8207 Firmware
Wago 750-8208
Wago 750-8208 Firmware
Wago 750-8210
Wago 750-8210 Firmware
Wago 750-8211
Wago 750-8211 Firmware
Wago 750-8212
Wago 750-8212 Firmware
Wago 750-8213
Wago 750-8213 Firmware
Wago 750-8214
Wago 750-8214 Firmware
Wago 750-8216
Wago 750-8216 Firmware
Wago 750-8217
Wago 750-8217 Firmware
Wago 750-823
Wago 750-823 Firmware
Wago 750-829
Wago 750-829 Firmware
Wago 750-831
Wago 750-831 Firmware
Wago 750-832
Wago 750-832 Firmware
Wago 750-852
Wago 750-852 Firmware
Wago 750-862
Wago 750-862 Firmware
Wago 750-880
Wago 750-880 Firmware
Wago 750-881
Wago 750-881 Firmware
Wago 750-882
Wago 750-882 Firmware
Wago 750-885
Wago 750-885 Firmware
Wago 750-889
Wago 750-889 Firmware
Wago 750-890
Wago 750-890 Firmware
Wago 750-891
Wago 750-891 Firmware
Wago 750-893
Wago 750-893 Firmware
CPEs cpe:2.3:a:codesys:codesys:*:*:*:*:*:*:*:*
cpe:2.3:h:wago:750-8202:-:*:*:*:*:*:*:*
cpe:2.3:h:wago:750-8203:-:*:*:*:*:*:*:*
cpe:2.3:h:wago:750-8204:-:*:*:*:*:*:*:*
cpe:2.3:h:wago:750-8206:-:*:*:*:*:*:*:*
cpe:2.3:h:wago:750-8207:-:*:*:*:*:*:*:*
cpe:2.3:h:wago:750-8208:-:*:*:*:*:*:*:*
cpe:2.3:h:wago:750-8210:-:*:*:*:*:*:*:*
cpe:2.3:h:wago:750-8211:-:*:*:*:*:*:*:*
cpe:2.3:h:wago:750-8212:-:*:*:*:*:*:*:*
cpe:2.3:h:wago:750-8213:-:*:*:*:*:*:*:*
cpe:2.3:h:wago:750-8214:-:*:*:*:*:*:*:*
cpe:2.3:h:wago:750-8216:-:*:*:*:*:*:*:*
cpe:2.3:h:wago:750-8217:-:*:*:*:*:*:*:*
cpe:2.3:h:wago:750-823:-:*:*:*:*:*:*:*
cpe:2.3:h:wago:750-829:-:*:*:*:*:*:*:*
cpe:2.3:h:wago:750-831:-:*:*:*:*:*:*:*
cpe:2.3:h:wago:750-832:-:*:*:*:*:*:*:*
cpe:2.3:h:wago:750-852:-:*:*:*:*:*:*:*
cpe:2.3:h:wago:750-862:-:*:*:*:*:*:*:*
cpe:2.3:h:wago:750-880:-:*:*:*:*:*:*:*
cpe:2.3:h:wago:750-881:-:*:*:*:*:*:*:*
cpe:2.3:h:wago:750-882:-:*:*:*:*:*:*:*
cpe:2.3:h:wago:750-885:-:*:*:*:*:*:*:*
cpe:2.3:h:wago:750-889:-:*:*:*:*:*:*:*
cpe:2.3:h:wago:750-890:-:*:*:*:*:*:*:*
cpe:2.3:h:wago:750-891:-:*:*:*:*:*:*:*
cpe:2.3:h:wago:750-893:-:*:*:*:*:*:*:*
cpe:2.3:o:wago:750-8202_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:wago:750-8203_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:wago:750-8204_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:wago:750-8206_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:wago:750-8207_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:wago:750-8208_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:wago:750-8210_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:wago:750-8211_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:wago:750-8212_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:wago:750-8213_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:wago:750-8214_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:wago:750-8216_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:wago:750-8217_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:wago:750-823_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:wago:750-829_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:wago:750-831_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:wago:750-832_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:wago:750-852_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:wago:750-862_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:wago:750-880_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:wago:750-881_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:wago:750-882_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:wago:750-885_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:wago:750-889_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:wago:750-890_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:wago:750-891_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:wago:750-893_firmware:*:*:*:*:*:*:*:*
Vendors & Products Codesys codesys
Wago
Wago 750-8202
Wago 750-8202 Firmware
Wago 750-8203
Wago 750-8203 Firmware
Wago 750-8204
Wago 750-8204 Firmware
Wago 750-8206
Wago 750-8206 Firmware
Wago 750-8207
Wago 750-8207 Firmware
Wago 750-8208
Wago 750-8208 Firmware
Wago 750-8210
Wago 750-8210 Firmware
Wago 750-8211
Wago 750-8211 Firmware
Wago 750-8212
Wago 750-8212 Firmware
Wago 750-8213
Wago 750-8213 Firmware
Wago 750-8214
Wago 750-8214 Firmware
Wago 750-8216
Wago 750-8216 Firmware
Wago 750-8217
Wago 750-8217 Firmware
Wago 750-823
Wago 750-823 Firmware
Wago 750-829
Wago 750-829 Firmware
Wago 750-831
Wago 750-831 Firmware
Wago 750-832
Wago 750-832 Firmware
Wago 750-852
Wago 750-852 Firmware
Wago 750-862
Wago 750-862 Firmware
Wago 750-880
Wago 750-880 Firmware
Wago 750-881
Wago 750-881 Firmware
Wago 750-882
Wago 750-882 Firmware
Wago 750-885
Wago 750-885 Firmware
Wago 750-889
Wago 750-889 Firmware
Wago 750-890
Wago 750-890 Firmware
Wago 750-891
Wago 750-891 Firmware
Wago 750-893
Wago 750-893 Firmware

Subscriptions

Codesys Codesys Plcwinnt Runtime Toolkit
Wago 750-8202 750-8202 Firmware 750-8203 750-8203 Firmware 750-8204 750-8204 Firmware 750-8206 750-8206 Firmware 750-8207 750-8207 Firmware 750-8208 750-8208 Firmware 750-8210 750-8210 Firmware 750-8211 750-8211 Firmware 750-8212 750-8212 Firmware 750-8213 750-8213 Firmware 750-8214 750-8214 Firmware 750-8216 750-8216 Firmware 750-8217 750-8217 Firmware 750-823 750-823 Firmware 750-829 750-829 Firmware 750-831 750-831 Firmware 750-832 750-832 Firmware 750-852 750-852 Firmware 750-862 750-862 Firmware 750-880 750-880 Firmware 750-881 750-881 Firmware 750-882 750-882 Firmware 750-885 750-885 Firmware 750-889 750-889 Firmware 750-890 750-890 Firmware 750-891 750-891 Firmware 750-893 750-893 Firmware
cve-icon MITRE

Status: PUBLISHED

Assigner: CERTVDE

Published:

Updated: 2024-09-17T03:42:53.986Z

Reserved: 2021-06-10T00:00:00.000Z

Link: CVE-2021-34595

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2021-10-26T10:15:08.070

Modified: 2025-08-15T20:25:40.657

Link: CVE-2021-34595

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses