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CVE-2021-42534

Status: ModifiedMedium (6.1)—

The affected product’s web application does not properly neutralize the input during webpage generation, which could allow an attacker to inject code in the input forms.

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)

Trane — Tracer SC Firmware

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2021-42534",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 4.3,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV31": [
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        "type": "Secondary",
        "source": "ics-cert@hq.dhs.gov",
        "cvssData": {
          "scope": "UNCHANGED",
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          "baseScore": 6.3,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
          "integrityImpact": "LOW",
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          "confidentialityImpact": "LOW"
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      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "CHANGED",
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          "confidentialityImpact": "LOW"
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  "affected": [
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      "source": "ics-cert@hq.dhs.gov",
      "affectedData": [
        {
          "vendor": "Trane",
          "product": "Tracer SC",
          "versions": [
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              "status": "affected",
              "version": "All",
              "versionType": "custom",
              "lessThanOrEqual": "3.8"
            }
          ]
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    }
  ],
  "published": "2021-10-22T14:15:08.690",
  "references": [
    {
      "url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-292-02",
      "tags": [
        "Third Party Advisory",
        "US Government Resource"
      ],
      "source": "ics-cert@hq.dhs.gov"
    },
    {
      "url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-292-02",
      "tags": [
        "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-79"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The affected product’s web application does not properly neutralize the input during webpage generation, which could allow an attacker to inject code in the input forms."
    },
    {
      "lang": "es",
      "value": "La aplicación web del producto afectado no neutraliza adecuadamente la entrada durante la generación de la página web, que podría permitir a un atacante inyectar código en los formularios de entrada"
    }
  ],
  "lastModified": "2026-06-17T04:09:46.927",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "versionEndIncluding": "3.8"
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  ],
  "sourceIdentifier": "ics-cert@hq.dhs.gov"
}