CVE-2021-34596

🗓️ 26 Oct 2021 09:55:54Reported by CERTVDEType

A crafted request causes read access to an uninitialized pointer in CODESYS V2 Runtime Toolkit 32 Bit, leading to denial-of-service

Reporter	Title	Published	Views	Family All 8
Circl	CVE-2021-34596	26 Oct 202114:14	–	circl
CNNVD	CODESYS 缓冲区错误漏洞	26 Oct 202100:00	–	cnnvd
Cvelist	CVE-2021-34596 CODESYS V2 runtime: Access of Uninitialized Pointer may result in denial-of-service	26 Oct 202109:55	–	cvelist
EUVD	EUVD-2021-21246	7 Oct 202500:30	–	euvd
NVD	CVE-2021-34596	26 Oct 202110:15	–	nvd
Prion	Race condition	26 Oct 202110:15	–	prion
Positive Technologies	PT-2021-20571 · 3S Smart Software Solutions · Codesys V2 Runtime Toolkit +1	26 Oct 202100:00	–	ptsecurity
Tenable Nessus	Wago CODESYS V2 Runtime Toolkit Access of Uninitialized Pointer (CVE-2021-34596)	9 Sep 202500:00	–	nessus

NVD

Vulners

Node

wago 750-823_firmwareRange<fw10

AND

wago 750-823Match-

Node

wago 750-829_firmwareRange<fw17

AND

wago 750-829Match-

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wago 750-831_firmwareRange<fw17

AND

wago 750-831Match-

Node

wago 750-832_firmwareRange<fw10

AND

wago 750-832Match-

Node

wago 750-852_firmwareRange<fw17

AND

wago 750-852Match-

Node

wago 750-862_firmwareRange<fw10

AND

wago 750-862Match-

Node

wago 750-880_firmwareRange<fw17

AND

wago 750-880Match-

Node

wago 750-881_firmwareRange<fw17

AND

wago 750-881Match-

Node

wago 750-882_firmwareRange<fw17

AND

wago 750-882Match-

Node

wago 750-885_firmwareRange<fw17

AND

wago 750-885Match-

Node

wago 750-889_firmwareRange<fw17

AND

wago 750-889Match-

Node

wago 750-890_firmwareRange<fw10

AND

wago 750-890Match-

Node

wago 750-891_firmwareRange<fw10

AND

wago 750-891Match-

Node

wago 750-893_firmwareRange<fw10

AND

wago 750-893Match-

Node

wago 750-8202_firmwareRange<fw20

AND

wago 750-8202Match-

Node

wago 750-8203_firmwareRange<fw20

AND

wago 750-8203Match-

Node

wago 750-8204_firmwareRange<fw20

AND

wago 750-8204Match-

Node

wago 750-8206_firmwareRange<fw20

AND

wago 750-8206Match-

Node

wago 750-8207_firmwareRange<fw20

AND

wago 750-8207Match-

Node

wago 750-8208_firmwareRange<fw20

AND

wago 750-8208Match-

Node

wago 750-8210_firmwareRange<fw20

AND

wago 750-8210Match-

Node

wago 750-8211_firmwareRange<fw20

AND

wago 750-8211Match-

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wago 750-8212_firmwareRange<fw20

AND

wago 750-8212Match-

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wago 750-8213_firmwareRange<fw20

AND

wago 750-8213Match-

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wago 750-8214_firmwareRange<fw20

AND

wago 750-8214Match-

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wago 750-8216_firmwareRange<fw20

AND

wago 750-8216Match-

Node

wago 750-8217_firmwareRange<fw20

AND

wago 750-8217Match-

Node

codesys codesysRange<1.1.9.22

codesys plcwinntRange<2.4.7.56

codesys runtime_toolkitRange<2.4.7.56x86

[
  {
    "product": "CODESYS V2",
    "vendor": "CODESYS",
    "versions": [
      {
        "lessThan": "V2.4.7.56",
        "status": "affected",
        "version": "Runtime Toolkit 32 bit full",
        "versionType": "custom"
      },
      {
        "lessThan": "V2.4.7.56",
        "status": "affected",
        "version": "PLCWinNT",
        "versionType": "custom"
      }
    ]
  }
]

Source	Link
customers	www.customers.codesys.com/index.php

15 Aug 2025 20:24Current

6.2Medium risk

Vulners AI Score6.2

CVSS 24

CVSS 3.16.5

EPSS0.00236

CWE-824