CVE-2021-4473
Tianxin Internet Behavior Management System Command Injection via toQuery.php
- State
- Published
- Severity
- 9.3 Critical
- Published
- Apr 7, 2026
- Updated
- May 14, 2026
- Reserved
- Jan 15, 2026
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).
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.3 Critical | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Affected Products
| Product | Versions |
|---|---|
Tianxin Internet Behavior Management SystemBeijing Topsec Network Security Technology Co., Ltd. |
|
References
- https://www.cnvd.org.cn/flaw/show/CNVD-2021-41972government-resource
- https://www.cnvd.org.cn/patchInfo/show/280166patch
- https://cn-sec.com/archives/4631959.htmltechnical-descriptionexploit
- https://avd.aliyun.com/detail?id=AVD-2021-890232third-party-advisory
- https://www.vulncheck.com/advisories/tianxin-internet-behavior-management-system-command-injection-via-toquery-phpthird-party-advisory
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