Vulnerability-Lookup

CVE-2026-76992 (GCVE-0-2026-76992)

Vulnerability from cvelistv5 – Published: 2026-09-30 11:07 – Updated: 2026-09-30 15:28

Title

Uncontrolled Memory Allocation in CODESYS Gateway Client

Summary

The CODESYS Gateway Client allocates memory based on a size field in a gateway response without enforcing an appropriate upper limit. An unauthenticated remote attacker controlling a malicious gateway can exploit this behavior to trigger excessive memory consumption, resulting in a denial-of-service condition thus leading to a total loss of availablity.

Severity

8.7 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-30 14:48 UTC

CWE

CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

CERTVDE CNA under the icscert root

CNA scorecard B 76/100 over 143 records in the last 180 days details

References

1 reference

URL	Tags
https://www.certvde.com/en/advisories/VDE-2026-094/

Impacted products

8 products

Vendor	Product	Version	CPE status
CODESYS	Development System 3	Affected: 3.0.0.0 , < 3.5.22.40 (generic)	guessed
CODESYS	Gateway	Affected: 3.0.0.0 , < 3.5.22.40 (generic)	guessed
CODESYS	Edge Gateway for Windows	Affected: 3.0.0.0 , < 3.5.22.40 (generic)	guessed
CODESYS	HMI (SL)	Affected: 3.0.0.0 , < 3.5.22.40 (generic)	guessed
CODESYS	OPC DA Server SL	Affected: 3.0.0.0 , < 3.5.22.40 (generic)	guessed
CODESYS	PLCHandler	Affected: 3.0.0.0 , < 3.5.22.40 (generic)	guessed
CODESYS	Runtime Toolkit	Affected: 3.0.0.0 , < 3.5.22.40 (generic)	guessed
CODESYS	Edge Gateway for Linux	Affected: 3.15.0.0 , < 4.23.0.0 (generic)	guessed

Credits

Delta Electronics Inc.

Show details on NVD website

JSON

To clipboard

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}

FKIE_CVE-2026-76992

Vulnerability from fkie_nvd - Published: 2026-09-30 11:16 - Updated: 2026-09-30 19:57

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Summary

References

	URL	Tags
	info@cert.vde.com	https://www.certvde.com/en/advisories/VDE-2026-094/

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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              "versionType": "generic"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Runtime Toolkit",
          "vendor": "CODESYS",
          "versions": [
            {
              "lessThan": "3.5.22.40",
              "status": "affected",
              "version": "3.0.0.0",
              "versionType": "generic"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Edge Gateway for Linux",
          "vendor": "CODESYS",
          "versions": [
            {
              "lessThan": "4.23.0.0",
              "status": "affected",
              "version": "3.15.0.0",
              "versionType": "generic"
            }
          ]
        }
      ],
      "source": "info@cert.vde.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The CODESYS Gateway Client allocates memory based on a size field in a gateway response without enforcing an appropriate upper limit. An unauthenticated remote attacker controlling a malicious gateway can exploit this behavior to trigger excessive memory consumption, resulting in a denial-of-service condition thus leading to a total loss of availablity."
    }
  ],
  "id": "CVE-2026-76992",
  "lastModified": "2026-09-30T19:57:08.043",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "info@cert.vde.com",
        "type": "Secondary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 8.7,
          "baseSeverity": "HIGH",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "HIGH",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "info@cert.vde.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-76992",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-30T14:48:15.816736Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-30T11:16:47.283",
  "references": [
    {
      "source": "info@cert.vde.com",
      "url": "https://www.certvde.com/en/advisories/VDE-2026-094/"
    }
  ],
  "sourceIdentifier": "info@cert.vde.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-770"
        }
      ],
      "source": "info@cert.vde.com",
      "type": "Secondary"
    }
  ]
}

GHSA-CM9R-92X3-HMFJ

Vulnerability from github – Published: 2026-09-30 12:35 – Updated: 2026-09-30 12:35

Details

Severity

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

8.7 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-76992"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-770"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-30T11:16:47Z",
    "severity": "HIGH"
  },
  "details": "The CODESYS Gateway Client allocates memory based on a size field in a gateway response without enforcing an appropriate upper limit. An unauthenticated remote attacker controlling a malicious gateway can exploit this behavior to trigger excessive memory consumption, resulting in a denial-of-service condition thus leading to a total loss of availablity.",
  "id": "GHSA-cm9r-92x3-hmfj",
  "modified": "2026-09-30T12:35:17Z",
  "published": "2026-09-30T12:35:17Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-76992"
    },
    {
      "type": "WEB",
      "url": "https://www.certvde.com/en/advisories/VDE-2026-094"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

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.

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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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.

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CVE-2026-76992 (GCVE-0-2026-76992)

FKIE_CVE-2026-76992

GHSA-CM9R-92X3-HMFJ

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