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CVE-2026-21620 TFTP Path Traversal

🗓️ 20 Feb 2026 10:57:08Reported by EEFType 
cvelist
 cvelist
🔗 www.cve.org👁 22 Views

CVE-2026-21620 allows relative path traversal in TFTP file handling across Erlang OTP modules.

Related
Affected
Refs
[
  {
    "collectionURL": "https://github.com",
    "cpes": [
      "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"
    ],
    "defaultStatus": "unaffected",
    "modules": [
      "tftp_file"
    ],
    "packageName": "erlang/otp",
    "packageURL": "pkg:github/erlang/otp",
    "product": "OTP",
    "programFiles": [
      "lib/tftp/src/tftp_file.erl"
    ],
    "repo": "https://github.com/erlang/otp",
    "vendor": "Erlang",
    "versions": [
      {
        "changes": [
          {
            "at": "26.2.5.17",
            "status": "unaffected"
          },
          {
            "at": "27.3.4.8",
            "status": "unaffected"
          },
          {
            "at": "28.3.2",
            "status": "unaffected"
          }
        ],
        "lessThan": "*",
        "status": "affected",
        "version": "17.0",
        "versionType": "otp"
      },
      {
        "changes": [
          {
            "at": "655fb95725ba2fb811740b57e106873833824344",
            "status": "unaffected"
          },
          {
            "at": "3970738f687325138eb75f798054fa8960ac354e",
            "status": "unaffected"
          },
          {
            "at": "696fdec922661d4a3cc528fc34bc24fae8d4ad8a",
            "status": "unaffected"
          }
        ],
        "lessThan": "*",
        "status": "affected",
        "version": "07b8f441ca711f9812fad9e9115bab3c3aa92f79",
        "versionType": "git"
      }
    ]
  },
  {
    "defaultStatus": "unaffected",
    "modules": [
      "tftp_file"
    ],
    "packageName": "inets",
    "packageURL": "pkg:otp/inets?repository_url=https:%2F%2Fgithub.com%2Ferlang%2Fotp&vcs_url=git%20https:%2F%2Fgithub.com%2Ferlang%2Fotp.git",
    "product": "OTP",
    "programFiles": [
      "src/tftp_file.erl"
    ],
    "repo": "https://github.com/erlang/otp",
    "vendor": "Erlang",
    "versions": [
      {
        "lessThan": "7.0",
        "status": "affected",
        "version": "5.10",
        "versionType": "otp"
      }
    ]
  },
  {
    "defaultStatus": "unaffected",
    "modules": [
      "tftp_file"
    ],
    "packageName": "tftp",
    "packageURL": "pkg:otp/tftp?repository_url=https:%2F%2Fgithub.com%2Ferlang%2Fotp&vcs_url=git%20https:%2F%2Fgithub.com%2Ferlang%2Fotp.git",
    "product": "OTP",
    "programFiles": [
      "src/tftp_file.erl"
    ],
    "repo": "https://github.com/erlang/otp",
    "vendor": "Erlang",
    "versions": [
      {
        "changes": [
          {
            "at": "1.1.1.1",
            "status": "unaffected"
          },
          {
            "at": "1.2.2.1",
            "status": "unaffected"
          },
          {
            "at": "1.2.4",
            "status": "unaffected"
          }
        ],
        "lessThan": "*",
        "status": "affected",
        "version": "1.0",
        "versionType": "otp"
      }
    ]
  }
]

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