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CVE-2026-48851

Estado: AnalizadaBaja (3.1)—

PuTTY 0.77 before 0.84 uses a copy of the PuTTY icon as a trust indication for TELNET data but the trust status is not cleared between proxy authentication and the main session.

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).

Tecnologías afectadas (1)

Putty — Putty

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-48851",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-48851",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-05-26T12:40:42.460737Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "cve@mitre.org",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 3.1,
          "attackVector": "NETWORK",
          "baseSeverity": "LOW",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "HIGH",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 1.6
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "PuTTY",
          "product": "PuTTY",
          "versions": [
            {
              "status": "affected",
              "version": "0.77",
              "lessThan": "0.84",
              "versionType": "custom"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-05-25T21:16:35.400",
  "references": [
    {
      "url": "https://lists.tartarus.org/pipermail/putty-announce/2026/000042.html",
      "tags": [
        "Release Notes"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/telnet-trust-sigil.html",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "cve@mitre.org"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "cve@mitre.org",
      "description": [
        {
          "lang": "en",
          "value": "CWE-451"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "PuTTY 0.77 before 0.84 uses a copy of the PuTTY icon as a trust indication for TELNET data but the trust status is not cleared between proxy authentication and the main session."
    },
    {
      "lang": "es",
      "value": "PuTTY 0.77 anterior a 0.84 utiliza una copia del icono de PuTTY como una indicación de confianza para datos TELNET pero el estado de confianza no se borra entre la autenticación de proxy y la sesión principal."
    }
  ],
  "lastModified": "2026-07-24T10:10:00.197",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:putty:putty:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "FF65EC81-FDC8-42A3-9608-A005EAA76A21",
              "versionEndExcluding": "0.84",
              "versionStartIncluding": "0.77"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}