cve-2021-4473

{
  "cvss": 0.0,
  "datePublished": "2026-04-06T00:00:00Z",
  "dateUpdated": "2026-04-06T00:00:00Z",
  "description": "Tianxin Internet Behavior Management System contains a command injection vulnerability in the Reporter component endpoint that allows unauthenticated attackers to execute arbitrary commands by supplying a crafted objClass parameter containing shell metacharacters and output redirection. Attackers can exploit this vulnerability to write malicious PHP files into the web root and achieve remote code execution with the privileges of the web server process. This vulnerability has been fixed in version NACFirmware_4.0.0.7_20210716.180815_topsec_0_basic.bin. Exploitation evidence was first observed by the Shadowserver Foundation on 2024-06-01 (UTC).",
  "dueDate": "",
  "id": "CVE-2021-4473",
  "kev_catalogs": [
    "vulncheck"
  ],
  "knownRansomwareCampaignUse": "Unknown",
  "product": "Tianxin Internet Behavior Management System",
  "requiredAction": "Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.",
  "severity": "HIGH",
  "source": "vulncheck_kev",
  "title": "topsecgroup tianxin_internet_behavior_management_system Improper Neutralization of Special Elements used in an OS Command",
  "vendor": "Beijing Topsec Network Security Technology Co., Ltd."
}