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CVE-2026-15511

Status: DeferredHigh (8.9)—

A vulnerability was determined in Comfast CF-WR631AX V3 up to 2.7.0.8. Affected by this vulnerability is the function system_wl_upload_pic_file of the file /usr/bin/webmgnt of the component FastCGI Backend. This manipulation of the argument filename causes os command injection. It is possible to initiate the attack remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

Vector CVSS 4.0 con AV:N/PR:N/UI:N indica acceso remoto sin autenticación. CWE-78 (OS command injection) en componente web expuesta (FastCGI Backend) → T1190. Inyección de comando en parámetro 'filename' permite ejecución de comandos arbitrarios → T1059.

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Privileged Account ManagementVulnerability ScanningRestrict Web-Based ContentNetwork SegmentationLimit Software InstallationLimit Access to Resource Over Network

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Comfast — Cf-wr631axAI

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2026-15511",
  "cveTags": [],
  "metrics": {
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          "options": [
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              "technicalImpact": "total"
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          "version": "2.0.3",
          "timestamp": "2026-07-14T14:48:08.778045Z"
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    "cvssMetricV31": [
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          "valueDensity": "NOT_DEFINED",
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          "exploitMaturity": "PROOF_OF_CONCEPT",
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          "vulnIntegrityImpact": "HIGH",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
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          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
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  },
  "affected": [
    {
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      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:a:comfast:cf-wr631ax_v3:*:*:*:*:*:*:*:*"
          ],
          "vendor": "Comfast",
          "modules": [
            "FastCGI Backend"
          ],
          "product": "CF-WR631AX V3",
          "versions": [
            {
              "status": "affected",
              "version": "2.7.0.0"
            },
            {
              "status": "affected",
              "version": "2.7.0.1"
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            {
              "status": "affected",
              "version": "2.7.0.2"
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              "status": "affected",
              "version": "2.7.0.5"
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              "version": "2.7.0.6"
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              "status": "affected",
              "version": "2.7.0.7"
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            {
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              "version": "2.7.0.8"
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  "published": "2026-07-12T23:16:38.137",
  "references": [
    {
      "url": "https://github.com/luminarydawn/cve/tree/main/Command%20Injection%20in%20Comfast%20CF-WR631AX%20V3%20%E2%80%94%20WiFi%20Portal%20Image%20Upload%20(CWE-78)",
      "source": "cna@vuldb.com"
    },
    {
      "url": "https://vuldb.com/cve/CVE-2026-15511",
      "source": "cna@vuldb.com"
    },
    {
      "url": "https://vuldb.com/submit/846719",
      "source": "cna@vuldb.com"
    },
    {
      "url": "https://vuldb.com/vuln/377840",
      "source": "cna@vuldb.com"
    },
    {
      "url": "https://vuldb.com/vuln/377840/cti",
      "source": "cna@vuldb.com"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "cna@vuldb.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-77"
        },
        {
          "lang": "en",
          "value": "CWE-78"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability was determined in Comfast CF-WR631AX V3 up to 2.7.0.8. Affected by this vulnerability is the function system_wl_upload_pic_file of the file /usr/bin/webmgnt of the component FastCGI Backend. This manipulation of the argument filename causes os command injection. It is possible to initiate the attack remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way."
    }
  ],
  "lastModified": "2026-07-14T15:16:58.863",
  "sourceIdentifier": "cna@vuldb.com"
}