FKIE_CVE-2026-7372

Vulnerability from fkie_nvd - Published: 2026-05-04 01:16 - Updated: 2026-10-26 20:10
Severity
9.0 (Critical) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
9.0 (Critical) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Summary
A stack overflow vulnerability exists in the WebCam Server Login functionality of GeoVision GV-VMS V20 20.0.2. A specially crafted HTTP request can lead to an arbitrary code execution. An attacker can make an unauthenticated HTTP request to trigger this vulnerability. #### Stack-overflow via unconstrained sscanf The call to `sscanf` at [1] to split the `Buffer` variable into the `username` and `password` variables doesn't limit the size of the extracted content to match the destination buffers' sizes. In this case, if either the username or password decoded from the authorization string exceeds `40` characters (the size the stack variables `username` and `password`) then a stack overflow will occur. The data is controlled by an attacker, but sronger constraints (e.g. no null bytes) may make exploitation harder. A successful attack could lead to full code execution as SYSTEM on the machine running the service.
References
0df08a0e-a200-4957-9bb0-084f562506f9https://talosintelligence.com/vulnerability_reports/Third Party Advisory
0df08a0e-a200-4957-9bb0-084f562506f9https://www.geovision.com.tw/cyber_security.phpVendor Advisory
Impacted products
Vendor Product Version
geovision gv-vms_firmware *
geovision gv-vms 20
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "platforms": [
            "Windows"
          ],
          "product": "GV-VMS V20.0.2",
          "vendor": "GeoVision Inc.",
          "versions": [
            {
              "status": "affected",
              "version": "20.0.2"
            },
            {
              "status": "unaffected",
              "version": "20.0.2.10"
            },
            {
              "status": "unaffected",
              "version": "20.1.0.0"
            }
          ]
        }
      ],
      "source": "0df08a0e-a200-4957-9bb0-084f562506f9"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:geovision:gv-vms_firmware:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "B00ABF0D-B29A-4345-BD05-3DBE33C9C3B3",
              "versionEndExcluding": "21.0.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:h:geovision:gv-vms:20:*:*:*:*:*:*:*",
              "matchCriteriaId": "7158CB54-54B4-45D7-9D21-2EC82123D4FB",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A stack overflow vulnerability exists in the WebCam Server Login functionality of GeoVision GV-VMS V20 20.0.2. A specially crafted HTTP request can lead to an arbitrary code execution. An attacker can make an unauthenticated HTTP request to trigger this vulnerability.\n\n#### Stack-overflow via unconstrained sscanf\n\nThe call to `sscanf` at [1] to split the `Buffer` variable into the `username` and `password` variables doesn\u0027t limit the size of the extracted content to match the destination buffers\u0027 sizes. In this case, if either the username or password decoded from the authorization string exceeds `40` characters (the size the stack variables  `username` and `password`) then a stack overflow will occur. \n\n\n\nThe data is controlled by an attacker, but sronger constraints (e.g. no null bytes) may make exploitation harder. A successful attack could  lead to full code execution as SYSTEM on the machine running the service."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de desbordamiento de pila existe en la funcionalidad de inicio de sesi\u00f3n del servidor de la c\u00e1mara web de GeoVision GV-VMS V20 20.0.2. Una solicitud HTTP especialmente dise\u00f1ada puede conducir a una ejecuci\u00f3n de c\u00f3digo arbitrario. Un atacante puede realizar una solicitud HTTP no autenticada para activar esta vulnerabilidad.\n\n#### Desbordamiento de pila a trav\u00e9s de sscanf sin restricciones\n\nLa llamada a \u201csscanf\u201d en [1] para dividir la variable \u201cBuffer\u201d en las variables \u201cusername\u201d y \u201cpassword\u201d no limita el tama\u00f1o del contenido extra\u00eddo para que coincida con los tama\u00f1os de los b\u00faferes de destino. En este caso, si el nombre de usuario o la contrase\u00f1a decodificados de la cadena de autorizaci\u00f3n excede los \u201c40\u201d caracteres (el tama\u00f1o de las variables de pila \u201cusername\u201d y \u201cpassword\u201d), entonces ocurrir\u00e1 un desbordamiento de pila.\n\nLos datos son controlados por un atacante, pero restricciones m\u00e1s fuertes (por ejemplo, sin bytes nulos) pueden dificultar la explotaci\u00f3n. Un ataque exitoso podr\u00eda conducir a la ejecuci\u00f3n completa de c\u00f3digo como SYSTEM en la m\u00e1quina que ejecuta el servicio."
    }
  ],
  "id": "CVE-2026-7372",
  "lastModified": "2026-10-26T20:10:00.160",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.0,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 6.0,
        "source": "0df08a0e-a200-4957-9bb0-084f562506f9",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.0,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 6.0,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-7372",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-05-04T00:00:00+00:00",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-05-04T01:16:04.730",
  "references": [
    {
      "source": "0df08a0e-a200-4957-9bb0-084f562506f9",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://talosintelligence.com/vulnerability_reports/"
    },
    {
      "source": "0df08a0e-a200-4957-9bb0-084f562506f9",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://www.geovision.com.tw/cyber_security.php"
    }
  ],
  "sourceIdentifier": "0df08a0e-a200-4957-9bb0-084f562506f9",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ],
      "source": "0df08a0e-a200-4957-9bb0-084f562506f9",
      "type": "Secondary"
    }
  ]
}



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