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TI-2021-13613 Aliases CVE-2021-34595GHSA-r36w-qc6c-g892

CODESYS V2 runtime: out-of-bounds read or write access may result in denial-of-service

Priority LOW 37CWE-823Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

EPSS 0.00855 58th percentileScored 2026-11-07
Fix Fixed CODESYS V2 (CODESYS): V2.4.7.56

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
CODESYSCODESYS V2Runtime Toolkit 32 bit full to before V2.4.7.56; PLCWinNT to before V2.4.7.56V2.4.7.56Patch availableCNA
  • CODESYS V2 VendorCODESYS Affected Runtime Toolkit 32 bit full to before V2.4.7.56; PLCWinNT to before V2.4.7.56 Fixed in V2.4.7.56 Patch available CNA

CPE configurations NVD · 57

CPEVersionsRoleVendor
cpe:2.3:o:wago:750-823_firmware:*:*:*:*:*:*:*:*before fw10VulnerableWAGO
cpe:2.3:h:wago:750-823:-:*:*:*:*:*:*:*not specified by NVDRunning onWAGO
cpe:2.3:o:wago:750-829_firmware:*:*:*:*:*:*:*:*before fw17VulnerableWAGO
cpe:2.3:h:wago:750-829:-:*:*:*:*:*:*:*not specified by NVDRunning onWAGO
cpe:2.3:o:wago:750-831_firmware:*:*:*:*:*:*:*:*before fw17VulnerableWAGO
cpe:2.3:h:wago:750-831:-:*:*:*:*:*:*:*not specified by NVDRunning onWAGO
cpe:2.3:o:wago:750-832_firmware:*:*:*:*:*:*:*:*before fw10VulnerableWAGO
cpe:2.3:h:wago:750-832:-:*:*:*:*:*:*:*not specified by NVDRunning onWAGO
cpe:2.3:o:wago:750-852_firmware:*:*:*:*:*:*:*:*before fw17VulnerableWAGO
cpe:2.3:h:wago:750-852:-:*:*:*:*:*:*:*not specified by NVDRunning onWAGO
  • cpe:2.3:o:wago:750-823_firmware:*:*:*:*:*:*:*:* Versions before fw10 Vulnerable ·WAGO
  • cpe:2.3:h:wago:750-823:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WAGO
  • cpe:2.3:o:wago:750-829_firmware:*:*:*:*:*:*:*:* Versions before fw17 Vulnerable ·WAGO
  • cpe:2.3:h:wago:750-829:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WAGO
  • cpe:2.3:o:wago:750-831_firmware:*:*:*:*:*:*:*:* Versions before fw17 Vulnerable ·WAGO
  • cpe:2.3:h:wago:750-831:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WAGO
  • cpe:2.3:o:wago:750-832_firmware:*:*:*:*:*:*:*:* Versions before fw10 Vulnerable ·WAGO
  • cpe:2.3:h:wago:750-832:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WAGO
  • cpe:2.3:o:wago:750-852_firmware:*:*:*:*:*:*:*:* Versions before fw17 Vulnerable ·WAGO
  • cpe:2.3:h:wago:750-852:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WAGO
Show 47 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:wago:750-862_firmware:*:*:*:*:*:*:*:*before fw10VulnerableWAGO
cpe:2.3:h:wago:750-862:-:*:*:*:*:*:*:*not specified by NVDRunning onWAGO
cpe:2.3:o:wago:750-880_firmware:*:*:*:*:*:*:*:*before fw17VulnerableWAGO
cpe:2.3:h:wago:750-880:-:*:*:*:*:*:*:*not specified by NVDRunning onWAGO
cpe:2.3:o:wago:750-881_firmware:*:*:*:*:*:*:*:*before fw17VulnerableWAGO
cpe:2.3:h:wago:750-881:-:*:*:*:*:*:*:*not specified by NVDRunning onWAGO
cpe:2.3:o:wago:750-882_firmware:*:*:*:*:*:*:*:*before fw17VulnerableWAGO
cpe:2.3:h:wago:750-882:-:*:*:*:*:*:*:*not specified by NVDRunning onWAGO
cpe:2.3:o:wago:750-885_firmware:*:*:*:*:*:*:*:*before fw17VulnerableWAGO
cpe:2.3:h:wago:750-885:-:*:*:*:*:*:*:*not specified by NVDRunning onWAGO
cpe:2.3:o:wago:750-889_firmware:*:*:*:*:*:*:*:*before fw17VulnerableWAGO
cpe:2.3:h:wago:750-889:-:*:*:*:*:*:*:*not specified by NVDRunning onWAGO
cpe:2.3:o:wago:750-890_firmware:*:*:*:*:*:*:*:*before fw10VulnerableWAGO
cpe:2.3:h:wago:750-890:-:*:*:*:*:*:*:*not specified by NVDRunning onWAGO
cpe:2.3:o:wago:750-891_firmware:*:*:*:*:*:*:*:*before fw10VulnerableWAGO
cpe:2.3:h:wago:750-891:-:*:*:*:*:*:*:*not specified by NVDRunning onWAGO
cpe:2.3:o:wago:750-893_firmware:*:*:*:*:*:*:*:*before fw10VulnerableWAGO
cpe:2.3:h:wago:750-893:-:*:*:*:*:*:*:*not specified by NVDRunning onWAGO
cpe:2.3:o:wago:750-8202_firmware:*:*:*:*:*:*:*:*before fw20VulnerableWAGO
cpe:2.3:h:wago:750-8202:-:*:*:*:*:*:*:*not specified by NVDRunning onWAGO
cpe:2.3:o:wago:750-8203_firmware:*:*:*:*:*:*:*:*before fw20VulnerableWAGO
cpe:2.3:h:wago:750-8203:-:*:*:*:*:*:*:*not specified by NVDRunning onWAGO
cpe:2.3:o:wago:750-8204_firmware:*:*:*:*:*:*:*:*before fw20VulnerableWAGO
cpe:2.3:h:wago:750-8204:-:*:*:*:*:*:*:*not specified by NVDRunning onWAGO
cpe:2.3:o:wago:750-8206_firmware:*:*:*:*:*:*:*:*before fw20VulnerableWAGO
cpe:2.3:h:wago:750-8206:-:*:*:*:*:*:*:*not specified by NVDRunning onWAGO
cpe:2.3:o:wago:750-8207_firmware:*:*:*:*:*:*:*:*before fw20VulnerableWAGO
cpe:2.3:h:wago:750-8207:-:*:*:*:*:*:*:*not specified by NVDRunning onWAGO
cpe:2.3:o:wago:750-8208_firmware:*:*:*:*:*:*:*:*before fw20VulnerableWAGO
cpe:2.3:h:wago:750-8208:-:*:*:*:*:*:*:*not specified by NVDRunning onWAGO
cpe:2.3:o:wago:750-8210_firmware:*:*:*:*:*:*:*:*before fw20VulnerableWAGO
cpe:2.3:h:wago:750-8210:-:*:*:*:*:*:*:*not specified by NVDRunning onWAGO
cpe:2.3:o:wago:750-8211_firmware:*:*:*:*:*:*:*:*before fw20VulnerableWAGO
cpe:2.3:h:wago:750-8211:-:*:*:*:*:*:*:*not specified by NVDRunning onWAGO
cpe:2.3:o:wago:750-8212_firmware:*:*:*:*:*:*:*:*before fw20VulnerableWAGO
cpe:2.3:h:wago:750-8212:-:*:*:*:*:*:*:*not specified by NVDRunning onWAGO
cpe:2.3:o:wago:750-8213_firmware:*:*:*:*:*:*:*:*before fw20VulnerableWAGO
cpe:2.3:h:wago:750-8213:-:*:*:*:*:*:*:*not specified by NVDRunning onWAGO
cpe:2.3:o:wago:750-8214_firmware:*:*:*:*:*:*:*:*before fw20VulnerableWAGO
cpe:2.3:h:wago:750-8214:-:*:*:*:*:*:*:*not specified by NVDRunning onWAGO
cpe:2.3:o:wago:750-8216_firmware:*:*:*:*:*:*:*:*before fw20VulnerableWAGO
cpe:2.3:h:wago:750-8216:-:*:*:*:*:*:*:*not specified by NVDRunning onWAGO
cpe:2.3:o:wago:750-8217_firmware:*:*:*:*:*:*:*:*before fw20VulnerableWAGO
cpe:2.3:h:wago:750-8217:-:*:*:*:*:*:*:*not specified by NVDRunning onWAGO
cpe:2.3:a:codesys:codesys:*:*:*:*:*:*:*:*before 1.1.9.22VulnerableCODESYS
cpe:2.3:a:codesys:plcwinnt:*:*:*:*:*:*:*:*before 2.4.7.56VulnerableCODESYS
cpe:2.3:a:codesys:runtime_toolkit:*:*:*:*:*:*:x86:*before 2.4.7.56VulnerableCODESYS
  • cpe:2.3:o:wago:750-862_firmware:*:*:*:*:*:*:*:* Versions before fw10 Vulnerable ·WAGO
  • cpe:2.3:h:wago:750-862:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WAGO
  • cpe:2.3:o:wago:750-880_firmware:*:*:*:*:*:*:*:* Versions before fw17 Vulnerable ·WAGO
  • cpe:2.3:h:wago:750-880:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WAGO
  • cpe:2.3:o:wago:750-881_firmware:*:*:*:*:*:*:*:* Versions before fw17 Vulnerable ·WAGO
  • cpe:2.3:h:wago:750-881:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WAGO
  • cpe:2.3:o:wago:750-882_firmware:*:*:*:*:*:*:*:* Versions before fw17 Vulnerable ·WAGO
  • cpe:2.3:h:wago:750-882:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WAGO
  • cpe:2.3:o:wago:750-885_firmware:*:*:*:*:*:*:*:* Versions before fw17 Vulnerable ·WAGO
  • cpe:2.3:h:wago:750-885:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WAGO
  • cpe:2.3:o:wago:750-889_firmware:*:*:*:*:*:*:*:* Versions before fw17 Vulnerable ·WAGO
  • cpe:2.3:h:wago:750-889:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WAGO
  • cpe:2.3:o:wago:750-890_firmware:*:*:*:*:*:*:*:* Versions before fw10 Vulnerable ·WAGO
  • cpe:2.3:h:wago:750-890:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WAGO
  • cpe:2.3:o:wago:750-891_firmware:*:*:*:*:*:*:*:* Versions before fw10 Vulnerable ·WAGO
  • cpe:2.3:h:wago:750-891:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WAGO
  • cpe:2.3:o:wago:750-893_firmware:*:*:*:*:*:*:*:* Versions before fw10 Vulnerable ·WAGO
  • cpe:2.3:h:wago:750-893:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WAGO
  • cpe:2.3:o:wago:750-8202_firmware:*:*:*:*:*:*:*:* Versions before fw20 Vulnerable ·WAGO
  • cpe:2.3:h:wago:750-8202:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WAGO
  • cpe:2.3:o:wago:750-8203_firmware:*:*:*:*:*:*:*:* Versions before fw20 Vulnerable ·WAGO
  • cpe:2.3:h:wago:750-8203:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WAGO
  • cpe:2.3:o:wago:750-8204_firmware:*:*:*:*:*:*:*:* Versions before fw20 Vulnerable ·WAGO
  • cpe:2.3:h:wago:750-8204:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WAGO
  • cpe:2.3:o:wago:750-8206_firmware:*:*:*:*:*:*:*:* Versions before fw20 Vulnerable ·WAGO
  • cpe:2.3:h:wago:750-8206:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WAGO
  • cpe:2.3:o:wago:750-8207_firmware:*:*:*:*:*:*:*:* Versions before fw20 Vulnerable ·WAGO
  • cpe:2.3:h:wago:750-8207:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WAGO
  • cpe:2.3:o:wago:750-8208_firmware:*:*:*:*:*:*:*:* Versions before fw20 Vulnerable ·WAGO
  • cpe:2.3:h:wago:750-8208:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WAGO
  • cpe:2.3:o:wago:750-8210_firmware:*:*:*:*:*:*:*:* Versions before fw20 Vulnerable ·WAGO
  • cpe:2.3:h:wago:750-8210:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WAGO
  • cpe:2.3:o:wago:750-8211_firmware:*:*:*:*:*:*:*:* Versions before fw20 Vulnerable ·WAGO
  • cpe:2.3:h:wago:750-8211:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WAGO
  • cpe:2.3:o:wago:750-8212_firmware:*:*:*:*:*:*:*:* Versions before fw20 Vulnerable ·WAGO
  • cpe:2.3:h:wago:750-8212:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WAGO
  • cpe:2.3:o:wago:750-8213_firmware:*:*:*:*:*:*:*:* Versions before fw20 Vulnerable ·WAGO
  • cpe:2.3:h:wago:750-8213:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WAGO
  • cpe:2.3:o:wago:750-8214_firmware:*:*:*:*:*:*:*:* Versions before fw20 Vulnerable ·WAGO
  • cpe:2.3:h:wago:750-8214:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WAGO
  • cpe:2.3:o:wago:750-8216_firmware:*:*:*:*:*:*:*:* Versions before fw20 Vulnerable ·WAGO
  • cpe:2.3:h:wago:750-8216:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WAGO
  • cpe:2.3:o:wago:750-8217_firmware:*:*:*:*:*:*:*:* Versions before fw20 Vulnerable ·WAGO
  • cpe:2.3:h:wago:750-8217:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WAGO
  • cpe:2.3:a:codesys:codesys:*:*:*:*:*:*:*:* Versions before 1.1.9.22 Vulnerable ·CODESYS
  • cpe:2.3:a:codesys:plcwinnt:*:*:*:*:*:*:*:* Versions before 2.4.7.56 Vulnerable ·CODESYS
  • cpe:2.3:a:codesys:runtime_toolkit:*:*:*:*:*:*:x86:* Versions before 2.4.7.56 Vulnerable ·CODESYS

Remediation

  • Fix · CNA CODESYS V2 (CODESYS) Fixed in V2.4.7.56

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    CODESYS V2 V2.4.7.56

    3 records Highest priority Priority LOW 3 LOW

    Other records, highest priority first

    • TI-2021-13611 CODESYS V2 runtime: unauthenticated invalid requests may result in denial-of-servicePriority LOW 38
    • TI-2021-13614 CODESYS V2 runtime: Access of Uninitialized Pointer may result in denial-of-servicePriority LOW 30
    Show all 3 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-34595
  2. 2026-10-03 Alias added: GHSA-r36w-qc6c-g892

References

Advisory 1

  • TI-2021-13604 CODESYS V2 web server: crafted requests could trigger a null pointer dereference (DoS) CVSS 3.1HIGH 7.5
  • TI-2019-12244 CODESYS V2.3 ENI server up to V3.2.2.24 has a Buffer Overflow. CVSS 3.1CRITICAL 9.8
  • TI-2021-13601 CODESYS V2 web server: crafted requests could trigger a heap-based buffer overflow (DoS) CVSS 3.1HIGH 7.5
  • TI-2021-13602 CODESYS V2 web server: crafted requests could trigger a buffer over-read (DoS) CVSS 3.1CRITICAL 9.1
  • TI-2019-10170 3S-Smart Software Solutions GmbH CODESYS V3 Library Manager, all versions prior to… CVSS 3.1HIGH 8.6
  • TI-2021-04914 Deserialization of untrusted data in CODESYS CVSS 3.1HIGH 7.8
See all 12 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences