GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2021-34595 (GCVE-0-2021-34595)

Vulnerability from cvelistv5 – Published: 2021-10-26 09:55 – Updated: 2024-09-17 03:42
VLAI
Title
CODESYS V2 runtime: out-of-bounds read or write access may result in denial-of-service
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.
Severity
8.1 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
CWE
  • CWE-823 - Use of Out-of-range Pointer Offset
Assigner
References
Impacted products
Vendor Product Version CPE status
CODESYS CODESYS V2 Affected: Runtime Toolkit 32 bit full , < V2.4.7.56 (custom)
Affected: PLCWinNT , < V2.4.7.56 (custom)
guessed Create a notification for this product.
Date Public
2021-10-25 00:00
Credits
This issue was reported by Chen Jie and Gao Jian of NSFOCUS.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T00:19:47.024Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://customers.codesys.com/index.php?eID=dumpFile\u0026t=f\u0026f=16878\u0026token=e5644ec405590e66aefa62304cb8632df9fc9e9c\u0026download="
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "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"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "This issue was reported by Chen Jie and Gao Jian of NSFOCUS."
        }
      ],
      "datePublic": "2021-10-25T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-823",
              "description": "CWE-823 Use of Out-of-range Pointer Offset",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-10-26T09:55:52.000Z",
        "orgId": "270ccfa6-a436-4e77-922e-914ec3a9685c",
        "shortName": "CERTVDE"
      },
      "references": [
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://customers.codesys.com/index.php?eID=dumpFile\u0026t=f\u0026f=16878\u0026token=e5644ec405590e66aefa62304cb8632df9fc9e9c\u0026download="
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "CODESYS GmbH has released the following product versions to solve the noted vulnerability issue for the affected CODESYS products:\n * CODESYS Runtime Toolkit 32 bit full version V2.4.7.56\n * CODESYS PLCWinNT version V2.4.7.56. This will also be part of the CODESYS Development System setup version V2.3.9.68."
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "CODESYS V2 runtime: out-of-bounds read or write access may result in denial-of-service",
      "x_generator": {
        "engine": "Vulnogram 0.0.9"
      },
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "info@cert.vde.com",
          "DATE_PUBLIC": "2021-10-25T14:00:00.000Z",
          "ID": "CVE-2021-34595",
          "STATE": "PUBLIC",
          "TITLE": "CODESYS V2 runtime: out-of-bounds read or write access may result in denial-of-service"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "CODESYS V2",
                      "version": {
                        "version_data": [
                          {
                            "version_affected": "\u003c",
                            "version_name": "Runtime Toolkit 32 bit full",
                            "version_value": "V2.4.7.56"
                          },
                          {
                            "version_affected": "\u003c",
                            "version_name": "PLCWinNT",
                            "version_value": "V2.4.7.56"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "CODESYS"
              }
            ]
          }
        },
        "credit": [
          {
            "lang": "eng",
            "value": "This issue was reported by Chen Jie and Gao Jian of NSFOCUS."
          }
        ],
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "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."
            }
          ]
        },
        "generator": {
          "engine": "Vulnogram 0.0.9"
        },
        "impact": {
          "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H",
            "version": "3.1"
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-823 Use of Out-of-range Pointer Offset"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://customers.codesys.com/index.php?eID=dumpFile\u0026t=f\u0026f=16878\u0026token=e5644ec405590e66aefa62304cb8632df9fc9e9c\u0026download=",
              "refsource": "CONFIRM",
              "url": "https://customers.codesys.com/index.php?eID=dumpFile\u0026t=f\u0026f=16878\u0026token=e5644ec405590e66aefa62304cb8632df9fc9e9c\u0026download="
            }
          ]
        },
        "solution": [
          {
            "lang": "en",
            "value": "CODESYS GmbH has released the following product versions to solve the noted vulnerability issue for the affected CODESYS products:\n * CODESYS Runtime Toolkit 32 bit full version V2.4.7.56\n * CODESYS PLCWinNT version V2.4.7.56. This will also be part of the CODESYS Development System setup version V2.3.9.68."
          }
        ],
        "source": {
          "discovery": "EXTERNAL"
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "270ccfa6-a436-4e77-922e-914ec3a9685c",
    "assignerShortName": "CERTVDE",
    "cveId": "CVE-2021-34595",
    "datePublished": "2021-10-26T09:55:52.868Z",
    "dateReserved": "2021-06-10T00:00:00.000Z",
    "dateUpdated": "2024-09-17T03:42:53.986Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2021-34595",
      "date": "2026-09-17",
      "epss": "0.00879",
      "percentile": "0.57373"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-34595\",\"sourceIdentifier\":\"info@cert.vde.com\",\"published\":\"2021-10-26T10:15:08.070\",\"lastModified\":\"2025-08-15T20:25:40.657\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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.\"},{\"lang\":\"es\",\"value\":\"Una petici\u00f3n dise\u00f1ada con valores no v\u00e1lidos puede causar un acceso de lectura o escritura fuera de l\u00edmites en CODESYS V2 Runtime Toolkit 32 Bit full y PLCWinNT versiones anteriores a V2.4.7.56, resultando en una condici\u00f3n de denegaci\u00f3n de servicio o una escritura excesiva de memoria local\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"info@cert.vde.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H\",\"baseScore\":8.1,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":5.2},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H\",\"baseScore\":8.1,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":5.2}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:L/Au:S/C:N/I:P/A:P\",\"baseScore\":5.5,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"SINGLE\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"PARTIAL\",\"availabilityImpact\":\"PARTIAL\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":8.0,\"impactScore\":4.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"info@cert.vde.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-823\"}]},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-119\"}]}],\"configurations\":[{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:wago:750-823_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"fw10\",\"matchCriteriaId\":\"CB62B4CC-6336-4B55-94D7-2B36CA7026E9\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:wago:750-823:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"CB88572A-CB05-4B52-8BFC-05EFDC819244\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:wago:750-829_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"fw17\",\"matchCriteriaId\":\"14796840-D7CC-4F28-9804-8155B780C5C2\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:wago:750-829:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"F88F6E08-2D1B-4B34-B8DB-40292C0BBEB2\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:wago:750-831_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"fw17\",\"matchCriteriaId\":\"2C7DB904-69F4-4588-9572-7E45D0DC0001\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:wago:750-831:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"F0631884-FF6F-4AA9-9D76-CDECB5A738FC\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:wago:750-832_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"fw10\",\"matchCriteriaId\":\"8779C92D-599D-4D99-8707-A190A81DD93C\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:wago:750-832:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"13D1FA8D-C8BA-4D1C-8372-DECD40177631\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:wago:750-852_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"fw17\",\"matchCriteriaId\":\"8303BFCA-85EA-45E3-BC60-4950EECFA480\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:wago:750-852:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"9D6739E1-EF0B-48EE-90FC-5708756FC362\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:wago:750-862_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"fw10\",\"matchCriteriaId\":\"A51ABA8B-6DF5-45DB-89C9-ED116FA9CAD2\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:wago:750-862:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"FA04FBFB-9E1C-4618-9FDC-70675506D8D5\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:wago:750-880_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"fw17\",\"matchCriteriaId\":\"D78A1283-111B-462E-A958-DB7212D7B04A\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:wago:750-880:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"CFEAC4D9-15CF-44B8-844D-C012AA4637A2\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:wago:750-881_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"fw17\",\"matchCriteriaId\":\"B8DC4322-1B14-4337-B611-23B9F8938D21\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:wago:750-881:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"6FE51647-62C1-4D3C-91FA-13ACA6CD71D2\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:wago:750-882_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"fw17\",\"matchCriteriaId\":\"C167AB43-9D9C-44F4-A3C3-892562830DB7\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:wago:750-882:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"B1379D65-F376-4618-B708-5E59D64C8033\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:wago:750-885_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"fw17\",\"matchCriteriaId\":\"48B9BDDC-063F-493D-AC1E-180F04086699\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:wago:750-885:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"7712F56E-AEBA-4DE0-9172-26F3D29B369B\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:wago:750-889_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"fw17\",\"matchCriteriaId\":\"C91305B6-0AD5-447C-9E8B-905D9065F938\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:wago:750-889:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"57919AAB-2962-4543-810A-C143300351F8\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:wago:750-890_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"fw10\",\"matchCriteriaId\":\"9F3F2723-F1D6-4565-BEB6-D3A4ABF8CD5D\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:wago:750-890:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"11751A8B-FCFD-433B-9065-B4FC85168A93\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:wago:750-891_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"fw10\",\"matchCriteriaId\":\"78B2640E-D3E0-46EB-B832-B026249DCCD1\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:wago:750-891:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"22BAABD9-A10D-4904-AA02-C37C4490B47A\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:wago:750-893_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"fw10\",\"matchCriteriaId\":\"F3207286-CD18-45BB-9578-3C004D48CC72\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:wago:750-893:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"4D4795D0-B90B-4643-8713-88D89172D1A5\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:wago:750-8202_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"fw20\",\"matchCriteriaId\":\"1EC04ED1-1CB4-480F-AA0E-648B3CDDE748\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:wago:750-8202:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"23B02096-81A5-4823-94F3-D87F389397DE\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:wago:750-8203_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"fw20\",\"matchCriteriaId\":\"FD2A9AC3-C6BC-4717-9965-6BD8DA0850BB\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:wago:750-8203:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"EC428EC8-532A-4825-BCE3-C42A4BC01C68\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:wago:750-8204_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"fw20\",\"matchCriteriaId\":\"3320B6C9-B791-48BC-8AD7-4557FE161193\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:wago:750-8204:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"7AF14BE1-1EB5-423B-9FE7-E401AEF92553\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:wago:750-8206_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"fw20\",\"matchCriteriaId\":\"56E7D2FB-09FF-49AF-A82F-C48A9EDFCAFB\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:wago:750-8206:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"2E17ECC4-D7AE-485C-A2EF-4148817F9DB8\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:wago:750-8207_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"fw20\",\"matchCriteriaId\":\"2859D0D6-5FF0-497C-ABA5-3DC03F4CB526\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:wago:750-8207:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"DA98A0D9-B050-430B-96C5-15932438FD3A\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:wago:750-8208_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"fw20\",\"matchCriteriaId\":\"4EE3EC4B-99B4-42A0-BBED-C30BF271D7CD\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:wago:750-8208:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"C86098FC-E63E-4676-8BA1-ADCA30795558\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:wago:750-8210_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"fw20\",\"matchCriteriaId\":\"AA3273B8-13BD-4FCD-826D-D41AFA443E56\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:wago:750-8210:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"1E11758B-46C3-4E57-943A-C9C073AE5211\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:wago:750-8211_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"fw20\",\"matchCriteriaId\":\"BB755670-0195-4819-9D43-70FE1F365E32\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:wago:750-8211:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"5CD6B267-3E4B-4597-82A6-130D6F21C728\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:wago:750-8212_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"fw20\",\"matchCriteriaId\":\"A88C970A-99B7-4E9B-87C4-5FC04D798931\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:wago:750-8212:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"20BBC380-0F6E-4400-93AF-5B6CFEF00562\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:wago:750-8213_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"fw20\",\"matchCriteriaId\":\"95C3EC2D-0E70-4DA1-9203-75B7069A616E\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:wago:750-8213:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"4969E8EB-EF09-47B9-8F03-37BB87CFD048\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:wago:750-8214_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"fw20\",\"matchCriteriaId\":\"3C15ACE6-923E-4663-8EBC-06A3AB0063D7\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:wago:750-8214:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"979A8E43-4285-4A7B-BB0B-E6888117862C\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:wago:750-8216_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"fw20\",\"matchCriteriaId\":\"8BCF2ADD-529D-43C7-9BB8-E384BBB4C6B4\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:wago:750-8216:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"3B854F74-173E-4523-BBA7-8FF7A9B9880E\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:wago:750-8217_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"fw20\",\"matchCriteriaId\":\"C00EB9A1-8709-40D9-8028-615980927BFA\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:wago:750-8217:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"B23CD8FD-FC7A-4E24-BF8F-648478D82645\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:codesys:codesys:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"1.1.9.22\",\"matchCriteriaId\":\"00DD970C-3E55-4EDC-A335-3C71C19B0E99\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:codesys:plcwinnt:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"2.4.7.56\",\"matchCriteriaId\":\"4AD330AD-254E-4E3E-A17E-BE08305AFBA0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:codesys:runtime_toolkit:*:*:*:*:*:*:x86:*\",\"versionEndExcluding\":\"2.4.7.56\",\"matchCriteriaId\":\"EC36E0FD-2487-4BA0-9EB8-174D30FD4DFB\"}]}]}],\"references\":[{\"url\":\"https://customers.codesys.com/index.php?eID=dumpFile\u0026t=f\u0026f=16878\u0026token=e5644ec405590e66aefa62304cb8632df9fc9e9c\u0026download=\",\"source\":\"info@cert.vde.com\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://customers.codesys.com/index.php?eID=dumpFile\u0026t=f\u0026f=16878\u0026token=e5644ec405590e66aefa62304cb8632df9fc9e9c\u0026download=\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]}]}}",
    "redhat_vex": {
      "current_release_date": "2026-03-27T13:55:23+00:00",
      "cve": "CVE-2021-34595",
      "id": "CVE-2021-34595",
      "initial_release_date": "2021-10-25T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "CODESYS V2 runtime: out-of-bounds read or write access may result in denial-of-service",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-34595.json",
      "version": "3"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.