Tenda G300-F Command Injection via formSetWanDiag

{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "cveMetadata": {
    "cveId": "CVE-2026-25857",
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "dateUpdated": "2026-02-07T21:41:41.340Z",
    "dateReserved": "2026-02-06T19:12:03.462Z",
    "datePublished": "2026-02-07T21:41:41.340Z",
    "state": "PUBLISHED"
  },
  "containers": {
    "cna": {
      "providerMetadata": {
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck",
        "dateUpdated": "2026-02-07T21:41:41.340Z"
      },
      "title": "Tenda G300-F Command Injection via formSetWanDiag",
      "descriptions": [
        {
          "lang": "en",
          "value": "Tenda G300-F router firmware versio 16.01.14.2 and prior contain an OS command injection vulnerability in the WAN diagnostic functionality (formSetWanDiag). The implementation constructs a shell command that invokes curl and incorporates attacker-controlled input into the command line without adequate neutralization. As a result, a remote attacker with access to the affected management interface can inject additional shell syntax and execute arbitrary commands on the device with the privileges of the management process.",
          "supportingMedia": [
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              "value": "Tenda G300-F router firmware versio 16.01.14.2 and prior contain an OS command injection vulnerability in the WAN diagnostic functionality (formSetWanDiag). The implementation constructs a shell command that invokes curl and incorporates attacker-controlled input into the command line without adequate neutralization. As a result, a remote attacker with access to the affected management interface can inject additional shell syntax and execute arbitrary commands on the device with the privileges of the management process."
            }
          ]
        }
      ],
      "affected": [
        {
          "vendor": "Shenzhen Tenda Technology",
          "product": "Tenda G300-F",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "16.01.14.2"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')",
              "cweId": "CWE-78",
              "type": "CWE"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://blog.evan.lat/blog/cve-2026-25857/",
          "tags": [
            "technical-description",
            "exploit"
          ]
        },
        {
          "url": "https://www.tendacn.com/material/show/736333682028613",
          "tags": [
            "product"
          ]
        },
        {
          "url": "https://www.vulncheck.com/advisories/tenda-g300-f-command-injection-via-formsetwandiag",
          "tags": [
            "third-party-advisory"
          ]
        }
      ],
      "metrics": [
        {
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
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      "credits": [
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          "lang": "en",
          "value": "evan",
          "type": "finder"
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