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CVE-2021-38421

Status: ModifiedHigh (7.1)—

Fuji Electric V-Server Lite and Tellus Lite V-Simulator prior to v4.0.12.0 is vulnerable to an out-of-bounds read, which may allow an attacker to read sensitive information from other memory locations or cause a crash.

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 (2)

Fujielectric — V-serverFujielectric — V-simulator

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2021-38421",
  "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
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "ics-cert@hq.dhs.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.8
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.1,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/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": "ics-cert@hq.dhs.gov",
      "affectedData": [
        {
          "vendor": "Fuji Electric",
          "product": "V-Server Lite",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified",
              "lessThan": "4.0.12.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "vendor": "Fuji Electric",
          "product": "Tellus Lite V-Simulator",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified",
              "lessThan": "4.0.12.0",
              "versionType": "custom"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-12-20T21:15:08.613",
  "references": [
    {
      "url": "https://www.cisa.gov/uscert/ics/advisories/icsa-21-299-01",
      "tags": [
        "Patch",
        "Third Party Advisory",
        "US Government Resource"
      ],
      "source": "ics-cert@hq.dhs.gov"
    },
    {
      "url": "https://www.cisa.gov/uscert/ics/advisories/icsa-21-299-01",
      "tags": [
        "Patch",
        "Third Party Advisory",
        "US Government Resource"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "ics-cert@hq.dhs.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Fuji Electric V-Server Lite and Tellus Lite V-Simulator prior to v4.0.12.0 is vulnerable to an out-of-bounds read, which may allow an attacker to read sensitive information from other memory locations or cause a crash."
    },
    {
      "lang": "es",
      "value": "Fuji Electric V-Server Lite y Tellus Lite V-Simulator versiones anteriores a 4.0.12.0, son vulnerables a una lectura fuera de límites, lo que puede permitir a un atacante leer información confidencial de otras ubicaciones de memoria o causar un bloqueo"
    }
  ],
  "lastModified": "2026-06-17T04:02:03.993",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:fujielectric:v-server:*:*:*:*:lite:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "BDE5CC23-7376-4E69-988E-42719159E52C",
              "versionEndExcluding": "4.0.12.0"
            },
            {
              "criteria": "cpe:2.3:a:fujielectric:v-simulator:*:*:*:*:lite:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "1A6F4C85-64D7-4F4A-8652-5D4B6F8E6914",
              "versionEndExcluding": "4.0.12.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "ics-cert@hq.dhs.gov"
}