CVE-2026-58082

Estado: AnalizadaCrítica (9.8)—

The ISO-2022 encoding module used a stack buffer sized to MB_LEN_MAX (6 bytes) for intermediate character output. Some ISO-2022 variants can require up to 10 bytes per character, in which case conversions can trigger a stack buffer overflow of up to four bytes.

An application that uses iconv(3) to convert untrusted input to or from one of the affected encodings may be vulnerable to buffer overflows if it uses one of the affected encoding modules.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Puntuación base: 9.8

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.52%
Percentil entre todas las CVEs puntuadas: 42
Fecha de la puntuación: 5/10/2026

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.

ExplotaciónT1190 Exploit Public-Facing Applicationinitial access85 %
Impacto principalT1059 Command and Scripting Interpreterexecution75 %
Impacto secundarioT1068 Exploitation for Privilege Escalationprivilege escalation70 %

Vector CVSS AV:N/AC:L/PR:N/UI:N indica explotación remota sin autenticación (T1190). Stack buffer overflow (CWE-121) en iconv(3) con untrusted input permite ejecución de código (T1059) y potencial escalada de privilegios (T1068).

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 Management Execution Prevention Application Isolation and Sandboxing Exploit Protection Update Software Vulnerability Scanning

Tecnologías afectadas (1)

Freebsd — Freebsd

CWE

CWE-121

Referencias

https://security.freebsd.org/advisories/FreeBSD-SA-26:49.iconv.asc

JSON original (NVD)

Mostrar

{
  "id": "CVE-2026-58082",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-58082",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-08-26T19:42:13.490088Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "secteam@freebsd.org",
      "affectedData": [
        {
          "vendor": "FreeBSD",
          "modules": [
            "iconv"
          ],
          "product": "FreeBSD",
          "versions": [
            {
              "status": "affected",
              "version": "15.1-RELEASE",
              "lessThan": "p1",
              "versionType": "release"
            },
            {
              "status": "affected",
              "version": "15.0-RELEASE",
              "lessThan": "p11",
              "versionType": "release"
            },
            {
              "status": "affected",
              "version": "14.4-RELEASE",
              "lessThan": "p7",
              "versionType": "release"
            },
            {
              "status": "affected",
              "version": "14.3-RELEASE",
              "lessThan": "p16",
              "versionType": "release"
            }
          ],
          "defaultStatus": "unknown"
        }
      ]
    }
  ],
  "published": "2026-08-19T08:17:12.370",
  "references": [
    {
      "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:49.iconv.asc",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "secteam@freebsd.org"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "secteam@freebsd.org",
      "description": [
        {
          "lang": "en",
          "value": "CWE-121"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The ISO-2022 encoding module used a stack buffer sized to MB_LEN_MAX (6 bytes) for intermediate character output.  Some ISO-2022 variants can require up to 10 bytes per character, in which case conversions can trigger a stack buffer overflow of up to four bytes.\n\nAn application that uses iconv(3) to convert untrusted input to or from one of the affected encodings may be vulnerable to buffer overflows if it uses one of the affected encoding modules."
    }
  ],
  "lastModified": "2026-08-31T19:02:19.657",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:14.3:-:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "9DC7C54E-58AF-4ADE-84AF-0EF0F325E20E"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "D3D22B8C-36CF-4800-9673-0B0240558BDD"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p10:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "7296F5AA-F8C1-4277-A4EE-C2B24073A320"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p11:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C30E4A9C-0594-4F40-92B3-26CB9AA85AE9"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p12:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "9F83F91B-587A-433C-99DB-0D63E267FF16"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p13:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "44B9C2FC-756E-459F-8E68-C2C2B8C258AC"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p14:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A11526CF-505E-47DF-8388-65CB216D2022"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p15:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "632175D0-5327-4458-8968-8FA39D00F236"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "242FA2A8-5D7D-4617-A411-2651FF3A3E4C"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p3:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "40573F60-F3B7-4AEC-846A-B08E5B7D9D00"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p4:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "1FB832CE-0A98-44A2-8BAC-CD38A64279B6"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p5:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "9A785F8E-C218-41AE-8D57-BF06DDAEF7CB"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p6:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C3909FDD-B2A2-45B6-A40B-1D303A717F15"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p7:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "720597A2-F181-46E1-8A0D-097E17ADC4FB"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p8:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "DC8A75D0-148A-427A-9783-45477EABED21"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:14.3:p9:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F5D39FC9-6DBA-46C8-BB80-A6188E6A8527"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:14.4:-:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "8F3856BE-666F-4FA1-A6AD-FE179CEBF1E4"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:14.4:p1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "D9CC0037-3282-42C3-80D8-F6C1D43B9332"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:14.4:p2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "1EADA828-3C20-43C0-A0CA-3AC7D7F23DBD"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:14.4:p3:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "53D73FD2-4B06-47D3-BA2A-4363E9DE3565"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:14.4:p4:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "D726890B-E679-43A9-A211-D5C05BBE3941"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:14.4:p5:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "CBE94635-5277-4050-8098-F062091F6596"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:14.4:p6:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A66308E4-DA6E-48DB-86E5-A503EE110EAD"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:14.4:rc1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "0342A715-E211-4AF6-97ED-32EB9EBB947D"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:15.0:-:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "368CFE5D-C5C2-42AF-AAF4-28DFE1A59C3B"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:15.0:p1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "AA4AAA57-70A7-4717-ACF2-A253E757FF2C"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:15.0:p10:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "683CEB32-A634-4363-86FB-2BDC59724E3E"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:15.0:p2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E24ABFA6-4D12-4DE5-832B-438502C7D188"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:15.0:p3:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C1C9869C-494B-4628-9AA3-4AA5B989C377"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:15.0:p4:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "002AA2FE-C7BA-471A-9434-0E56A878ACBF"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:15.0:p5:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B187670D-E3A2-4A0D-A653-982F8B447E78"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:15.0:p6:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "047E7EE9-FB51-4CF2-A8BE-484BFD819565"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:15.0:p7:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "2C9768AE-9954-4B2A-9525-D7D4942406E7"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:15.0:p8:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F8B9EF55-3755-452A-B067-043803099B22"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:15.0:p9:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "EE3C4F40-A117-4B37-8CDD-096A1A763630"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:15.1:-:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "BD327D43-A2DC-49B5-A578-D2116E1E12F3"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:15.1:rc2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "BF16D01F-95EC-4FE3-B32D-135CB82E8391"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:15.1:rc3-p1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "75973F7C-645A-438C-A03B-C77AAAD20C15"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "secteam@freebsd.org"
}