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CVE-2026-42996

Estado: AplazadaCrítica (10)—

JS8Call through 2.3.1 and JS8Call-improved before 3.0 have a stack-based buffer overflow via a radio transmission of @APRSIS GRID followed by a long Maidenhead locator. This occurs in grid2deg in APRSISClient.cpp.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Stack buffer overflow en servicio de radio expuesto en red (AV:N, PR:N, UI:N). Permite ejecución de código arbitrario mediante transmisión APRSIS malformada con locator largo.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Privileged Account ManagementVulnerability ScanningRestrict Web-Based ContentNetwork SegmentationLimit Software InstallationLimit Access to Resource Over Network

Tecnologías afectadas (2)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Js8call — Js8callAIJs8call — Js8call-improvedAI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-42996",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-42996",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-05-01T13:24:04.476930Z"
        }
      }
    ],
    "cvssMetricV40": [
      {
        "type": "Secondary",
        "source": "cve@mitre.org",
        "cvssData": {
          "Safety": "PRESENT",
          "version": "4.0",
          "Recovery": "USER",
          "baseScore": 10,
          "Automatable": "YES",
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "valueDensity": "DIFFUSE",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:P/AU:Y/R:U/V:D/RE:M/U:Green",
          "exploitMaturity": "NOT_DEFINED",
          "providerUrgency": "GREEN",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "privilegesRequired": "NONE",
          "subIntegrityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "subAvailabilityImpact": "HIGH",
          "vulnAvailabilityImpact": "HIGH",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "subConfidentialityImpact": "HIGH",
          "vulnConfidentialityImpact": "HIGH",
          "confidentialityRequirement": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "MODERATE",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
        }
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "JS8Call",
          "product": "JS8Call",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "versionType": "semver",
              "lessThanOrEqual": "2.3.1"
            }
          ],
          "defaultStatus": "unknown"
        },
        {
          "vendor": "JS8Call-improved",
          "product": "JS8Call-improved",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "3.0",
              "versionType": "custom"
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          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-05-01T07:15:59.787",
  "references": [
    {
      "url": "https://amateur-radio-resources.sourceforge.io/PDF/JS8APRS.pdf",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://github.com/JS8Call-improved/JS8Call-improved/commit/a6c7a19b82bbd7c2c0c892576f84d7449e8c7088",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://github.com/JS8Call-improved/JS8Call-improved/security/advisories/GHSA-98hp-pjp7-w62x",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://github.com/js8call/js8call/blob/fd721e8b67eed84cb3c09d018205ab9a53e1a8b1/APRSISClient.cpp#L89-L102",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://github.com/JS8Call-improved/JS8Call-improved/security/advisories/GHSA-98hp-pjp7-w62x",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
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      "type": "Secondary",
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      "description": [
        {
          "lang": "en",
          "value": "CWE-121"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "JS8Call through 2.3.1 and JS8Call-improved before 3.0 have a stack-based buffer overflow via a radio transmission of @APRSIS GRID followed by a long Maidenhead locator. This occurs in grid2deg in APRSISClient.cpp."
    }
  ],
  "lastModified": "2026-06-17T10:48:43.830",
  "sourceIdentifier": "cve@mitre.org"
}