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CVE-2018-11593

Status: ModifiedHigh (7.1)—
Severity7.1High · CVSS 3.0
Exploitation probability1.23 %higher than 69% of CVEs
Active exploitationNonot in the CISA catalog
Public exploitNot knownno public code found

Espruino before 1.99 allows attackers to cause a denial of service (application crash) and potential Information Disclosure with a user crafted input file via a Buffer Overflow during syntax parsing because strncpy is misused in jslex.c.

CVSS

Base score
7.1
Version
3.0
Vector
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days
1.23 %
Percentile among all scored CVEs
69
Score date
10/24/2026

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)

Espruino — Espruino

CWEs

References

Show 6 references

Raw JSON (NVD)

Show
{
  "id": "CVE-2018-11593",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5.8,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 4.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.0",
          "baseScore": 7.1,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.2,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
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      ]
    }
  ],
  "published": "2018-05-31T16:29:00.393",
  "references": [
    {
      "url": "https://github.com/espruino/Espruino/commit/bed844f109b6c222816740555068de2e101e8018",
      "tags": [
        "Patch",
        "Vendor Advisory"
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      "source": "cve@mitre.org"
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    {
      "url": "https://github.com/espruino/Espruino/files/2019228/eh_0.txt",
      "tags": [
        "Exploit",
        "Vendor Advisory"
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      "source": "cve@mitre.org"
    },
    {
      "url": "https://github.com/espruino/Espruino/issues/1426",
      "tags": [
        "Issue Tracking",
        "Vendor Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://github.com/espruino/Espruino/commit/bed844f109b6c222816740555068de2e101e8018",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/espruino/Espruino/files/2019228/eh_0.txt",
      "tags": [
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        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/espruino/Espruino/issues/1426",
      "tags": [
        "Issue Tracking",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Espruino before 1.99 allows attackers to cause a denial of service (application crash) and potential Information Disclosure with a user crafted input file via a Buffer Overflow during syntax parsing because strncpy is misused in jslex.c."
    },
    {
      "lang": "es",
      "value": "Espruino en versiones anteriores a la 1.99 permite que los atacantes provoquen una denegación de servicio (cierre inesperado de la aplicación) y, posiblemente, una divulgación de información con un archivo de entrada manipulado por el usuario mediante un desbordamiento de búfer durante el análisis sintáctico porque strncpy se emplea incorrectamente en jslex.c."
    }
  ],
  "lastModified": "2026-06-17T01:36:13.990",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:espruino:espruino:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "0AC819A2-4289-44FA-9EBB-12DC6DB5455F",
              "versionEndExcluding": "1.99"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}