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CVE-2017-17668

Status: ModifiedHigh (7.5)—

Memory write mechanism in NCR S1 Dispenser controller before firmware version 0x0156 allows an unauthenticated user to upgrade or downgrade the firmware of the device, including to older versions with known vulnerabilities.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

NCR — S1 Dispenser Controller Firmware

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2017-17668",
  "cveTags": [],
  "metrics": {
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        "source": "nvd@nist.gov",
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          "baseScore": 7.8,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:C/A:N",
          "authentication": "NONE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 6.9,
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        "obtainAllPrivilege": false,
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        "obtainUserPrivilege": false,
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          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
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        "impactScore": 3.6,
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  "affected": [
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      "affectedData": [
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  "published": "2018-03-20T14:29:00.350",
  "references": [
    {
      "url": "https://www.ncr.com/sites/default/files/ncr_security_alert_-_2018-04_v3.pdf",
      "tags": [
        "Broken Link",
        "Vendor Advisory"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  "vulnStatus": "Modified",
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      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-863"
        }
      ]
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  ],
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      "lang": "en",
      "value": "Memory write mechanism in NCR S1 Dispenser controller before firmware version 0x0156 allows an unauthenticated user to upgrade or downgrade the firmware of the device, including to older versions with known vulnerabilities."
    },
    {
      "lang": "es",
      "value": "El mecanismo de escritura en memoria de los controladores NCR S1 Dispenser, en versiones de firmware anteriores a 0x0156, permite que un usuario no autenticado actualice o degrade el firmware del dispositivo, incluyendo versiones más antiguas con vulnerabilidades conocidas."
    }
  ],
  "lastModified": "2026-06-17T01:11:28.027",
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}