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CVE-2026-21620

Estado: AplazadaBaja (2.3)—

Relative Path Traversal, Improper Isolation or Compartmentalization vulnerability in erlang otp erlang/otp (tftp_file modules), erlang otp inets (tftp_file modules), erlang otp tftp (tftp_file modules) allows Relative Path Traversal. This vulnerability is associated with program files lib/tftp/src/tftp_file.erl, src/tftp_file.erl.

This issue affects OTP from OTP 17.0 before OTP 28.3.2, OTP 27.3.4.8 and OTP 26.2.5.17, corresponding to tftp from 1.0 before 1.2.4, 1.2.2.1 and 1.1.1.1; also inets from 5.10 before 7.0.

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 (3)

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

Erlang — InetsAIErlang — OTPAIErlang — TftpAI

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-21620",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-21620",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-02-20T13:36:03.423294Z"
        }
      }
    ],
    "cvssMetricV40": [
      {
        "type": "Secondary",
        "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "cvssData": {
          "Safety": "NOT_DEFINED",
          "version": "4.0",
          "Recovery": "NOT_DEFINED",
          "baseScore": 2.3,
          "Automatable": "NOT_DEFINED",
          "attackVector": "NETWORK",
          "baseSeverity": "LOW",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/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:X/AU:X/R:X/V:X/RE:X/U:X",
          "exploitMaturity": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "attackRequirements": "PRESENT",
          "privilegesRequired": "LOW",
          "subIntegrityImpact": "NONE",
          "vulnIntegrityImpact": "LOW",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "vulnAvailabilityImpact": "NONE",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "subConfidentialityImpact": "NONE",
          "vulnConfidentialityImpact": "LOW",
          "confidentialityRequirement": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
        }
      }
    ]
  },
  "affected": [
    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"
          ],
          "repo": "https://github.com/erlang/otp",
          "vendor": "Erlang",
          "modules": [
            "tftp_file"
          ],
          "product": "OTP",
          "versions": [
            {
              "status": "affected",
              "changes": [
                {
                  "at": "26.2.5.17",
                  "status": "unaffected"
                },
                {
                  "at": "27.3.4.8",
                  "status": "unaffected"
                },
                {
                  "at": "28.3.2",
                  "status": "unaffected"
                }
              ],
              "version": "17.0",
              "lessThan": "*",
              "versionType": "otp"
            },
            {
              "status": "affected",
              "changes": [
                {
                  "at": "655fb95725ba2fb811740b57e106873833824344",
                  "status": "unaffected"
                },
                {
                  "at": "3970738f687325138eb75f798054fa8960ac354e",
                  "status": "unaffected"
                },
                {
                  "at": "696fdec922661d4a3cc528fc34bc24fae8d4ad8a",
                  "status": "unaffected"
                }
              ],
              "version": "07b8f441ca711f9812fad9e9115bab3c3aa92f79",
              "lessThan": "*",
              "versionType": "git"
            }
          ],
          "packageURL": "pkg:github/erlang/otp",
          "packageName": "erlang/otp",
          "programFiles": [
            "lib/tftp/src/tftp_file.erl"
          ],
          "collectionURL": "https://github.com",
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://github.com/erlang/otp",
          "vendor": "Erlang",
          "modules": [
            "tftp_file"
          ],
          "product": "OTP",
          "versions": [
            {
              "status": "affected",
              "version": "5.10",
              "lessThan": "7.0",
              "versionType": "otp"
            }
          ],
          "packageURL": "pkg:otp/inets?repository_url=https:%2F%2Fgithub.com%2Ferlang%2Fotp&vcs_url=git%20https:%2F%2Fgithub.com%2Ferlang%2Fotp.git",
          "packageName": "inets",
          "programFiles": [
            "src/tftp_file.erl"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://github.com/erlang/otp",
          "vendor": "Erlang",
          "modules": [
            "tftp_file"
          ],
          "product": "OTP",
          "versions": [
            {
              "status": "affected",
              "changes": [
                {
                  "at": "1.1.1.1",
                  "status": "unaffected"
                },
                {
                  "at": "1.2.2.1",
                  "status": "unaffected"
                },
                {
                  "at": "1.2.4",
                  "status": "unaffected"
                }
              ],
              "version": "1.0",
              "lessThan": "*",
              "versionType": "otp"
            }
          ],
          "packageURL": "pkg:otp/tftp?repository_url=https:%2F%2Fgithub.com%2Ferlang%2Fotp&vcs_url=git%20https:%2F%2Fgithub.com%2Ferlang%2Fotp.git",
          "packageName": "tftp",
          "programFiles": [
            "src/tftp_file.erl"
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-02-20T11:15:56.783",
  "references": [
    {
      "url": "https://cna.erlef.org/cves/CVE-2026-21620.html",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    },
    {
      "url": "https://github.com/erlang/otp/commit/3970738f687325138eb75f798054fa8960ac354e",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    },
    {
      "url": "https://github.com/erlang/otp/commit/655fb95725ba2fb811740b57e106873833824344",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    },
    {
      "url": "https://github.com/erlang/otp/commit/696fdec922661d4a3cc528fc34bc24fae8d4ad8a",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    },
    {
      "url": "https://github.com/erlang/otp/pull/10706",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    },
    {
      "url": "https://github.com/erlang/otp/security/advisories/GHSA-hmrc-prh3-rpvp",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    },
    {
      "url": "https://osv.dev/vulnerability/EEF-CVE-2026-21620",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    },
    {
      "url": "https://www.erlang.org/doc/system/versions.html#order-of-versions",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "description": [
        {
          "lang": "en",
          "value": "CWE-23"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Relative Path Traversal, Improper Isolation or Compartmentalization vulnerability in erlang otp erlang/otp (tftp_file modules), erlang otp inets (tftp_file modules), erlang otp tftp (tftp_file modules) allows Relative Path Traversal. This vulnerability is associated with program files lib/tftp/src/tftp_file.erl, src/tftp_file.erl.\n\nThis issue affects OTP from OTP 17.0 before OTP 28.3.2, OTP 27.3.4.8 and OTP 26.2.5.17, corresponding to tftp from 1.0 before 1.2.4, 1.2.2.1 and 1.1.1.1; also inets from 5.10 before 7.0."
    },
    {
      "lang": "es",
      "value": "Salto de ruta relativo, vulnerabilidad de aislamiento o compartimentación inadecuados en erlang otp erlang/otp (módulos tftp_file), erlang otp inets (módulos tftp_file), erlang otp tftp (módulos tftp_file) permite Salto de ruta relativo. Esta vulnerabilidad está asociada con los archivos de programa lib/tftp/src/tftp_file.erl, src/tftp_file.erl.\n\nEste problema afecta a otp: desde 17.0, desde 07b8f441ca711f9812fad9e9115bab3c3aa92f79; otp: desde 5.10 antes de 7.0; otp: desde 1.0."
    }
  ],
  "lastModified": "2026-07-24T15:17:13.700",
  "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
}