Vulnerability-Lookup

FKIE_CVE-2026-20797

Vulnerability from fkie_nvd - Published: 2026-02-27 02:16 - Updated: 2026-06-17 10:17

Severity

4.3 (Medium) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

A stack based buffer overflow exists in an API route of XWEB Pro version 1.12.1 and prior, enabling unauthenticated attackers to cause stack corruption and a termination of the program.

References

URL	Tags
ics-cert@hq.dhs.gov	https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-057-10.json	Third Party Advisory
ics-cert@hq.dhs.gov	https://webapps.copeland.com/Dixell/Pages/SystemSoftwareUpdate	Product
ics-cert@hq.dhs.gov	https://www.cisa.gov/news-events/ics-advisories/icsa-26-057-10	Third Party Advisory, US Government Resource

Impacted products

Vendor	Product	Version
copeland	xweb_300d_pro_firmware	*
copeland	xweb_300d_pro	-
copeland	xweb_500d_pro_firmware	*
copeland	xweb_500d_pro	-
copeland	xweb_500b_pro_firmware	*
copeland	xweb_500b_pro	-

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Copeland XWEB 300D PRO",
          "vendor": "Copeland",
          "versions": [
            {
              "lessThanOrEqual": "1.12.1",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Copeland XWEB 500D PRO",
          "vendor": "Copeland",
          "versions": [
            {
              "lessThanOrEqual": "1.12.1",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Copeland XWEB 500B PRO",
          "vendor": "Copeland",
          "versions": [
            {
              "lessThanOrEqual": "1.12.1",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "ics-cert@hq.dhs.gov"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:copeland:xweb_300d_pro_firmware:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "BF93AA67-7ABF-45C8-8376-7A28F7D65464",
              "versionEndIncluding": "1.12.1",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
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              "criteria": "cpe:2.3:h:copeland:xweb_300d_pro:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "AEA10B9B-531A-4775-B32D-AC743D696126",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    },
    {
      "nodes": [
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              "criteria": "cpe:2.3:o:copeland:xweb_500d_pro_firmware:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "088F312E-06DF-4B90-A478-A6B5A39DE0F0",
              "versionEndIncluding": "1.12.1",
              "vulnerable": true
            }
          ],
          "negate": false,
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        },
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              "vulnerable": false
            }
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          "negate": false,
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      "operator": "AND"
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      "nodes": [
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              "criteria": "cpe:2.3:o:copeland:xweb_500b_pro_firmware:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "E13AD164-C82A-4D6C-84C0-83EB8B0A611C",
              "versionEndIncluding": "1.12.1",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
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              "criteria": "cpe:2.3:h:copeland:xweb_500b_pro:-:*:*:*:*:*:*:*",
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              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A stack based buffer overflow exists in an API route of XWEB Pro version\n 1.12.1 and prior, enabling unauthenticated attackers to cause stack \ncorruption and a termination of the program."
    },
    {
      "lang": "es",
      "value": "Existe un desbordamiento de b\u00fafer basado en pila en una ruta de API de XWEB Pro versi\u00f3n 1.12.1 y anteriores, lo que permite a atacantes no autenticados causar corrupci\u00f3n de pila y la terminaci\u00f3n del programa."
    }
  ],
  "id": "CVE-2026-20797",
  "lastModified": "2026-06-17T10:17:48.100",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "ADJACENT_NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 1.4,
        "source": "ics-cert@hq.dhs.gov",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
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        "ssvcData": {
          "id": "CVE-2026-20797",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-03-02T14:25:26.397993Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-02-27T02:16:18.343",
  "references": [
    {
      "source": "ics-cert@hq.dhs.gov",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-057-10.json"
    },
    {
      "source": "ics-cert@hq.dhs.gov",
      "tags": [
        "Product"
      ],
      "url": "https://webapps.copeland.com/Dixell/Pages/SystemSoftwareUpdate"
    },
    {
      "source": "ics-cert@hq.dhs.gov",
      "tags": [
        "Third Party Advisory",
        "US Government Resource"
      ],
      "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-26-057-10"
    }
  ],
  "sourceIdentifier": "ics-cert@hq.dhs.gov",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-121"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}

CVE-2026-20797 (GCVE-0-2026-20797)

Vulnerability from cvelistv5 – Published: 2026-02-27 01:03 – Updated: 2026-05-10 13:30

Title

Copeland XWEB and XWEB Pro Stack-based Buffer Overflow

Summary

A stack based buffer overflow exists in an API route of XWEB Pro version 1.12.1 and prior, enabling unauthenticated attackers to cause stack corruption and a termination of the program.

Severity

4.3 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-03-02 14:25 UTC

CWE

WE-121
CWE-121 - Stack-based Buffer Overflow

Assigner

icscert icscert root Scorecard

References

3 references

URL	Tags
https://webapps.copeland.com/Dixell/Pages/SystemS…
https://www.cisa.gov/news-events/ics-advisories/i…
https://github.com/cisagov/CSAF/blob/develop/csaf…

Impacted products

3 products

Vendor	Product	Version
Copeland	Copeland XWEB 300D PRO	Affected: 0 , ≤ 1.12.1 (custom)
Copeland	Copeland XWEB 500D PRO	Affected: 0 , ≤ 1.12.1 (custom)
Copeland	Copeland XWEB 500B PRO	Affected: 0 , ≤ 1.12.1 (custom)

Credits

Amir Zaltzman and Noam Moshe of Claroty Team82 reported this vulnerability to CISA.

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-20797",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-02T14:25:26.397993Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-121",
                "description": "CWE-121 Stack-based Buffer Overflow",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-10T13:30:10.603Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Copeland XWEB 300D PRO",
          "vendor": "Copeland",
          "versions": [
            {
              "lessThanOrEqual": "1.12.1",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Copeland XWEB 500D PRO",
          "vendor": "Copeland",
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          "vendor": "Copeland",
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      "credits": [
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          "type": "finder",
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      ],
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    "datePublished": "2026-02-27T01:03:18.783Z",
    "dateReserved": "2026-02-05T16:47:16.578Z",
    "dateUpdated": "2026-05-10T13:30:10.603Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

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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FKIE_CVE-2026-20797

CVE-2026-20797 (GCVE-0-2026-20797)

Tags

Sightings

Nomenclature

Related by attack behaviour