How severe is CVE-2021-4473?

Critical severity. CVSS v3 base score is 9.8 out of 10.

RCE in Beijing Topsec Network Security Technology Co., Ltd. Tianxin Internet Behavior Management System

CVE-2021-4473

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 contain…

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.060 (90.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Beijing Topsec Network Security Technology Co., Ltd. Tianxin Internet Behavior Management System — versions 0

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

www.cnvd.org.cn/flaw/show/CNVD-2021-41972 (government-resource)
www.cnvd.org.cn/patchInfo/show/280166 (patch)
cn-sec.com/archives/4631959.html (technical-description, exploit)
avd.aliyun.com/detail (third-party-advisory)
www.vulncheck.com/advisories/tianxin-internet-behavior-management-system-comman… (third-party-advisory)

Frequently asked questions

What is CVE-2021-4473?: CVE-2021-4473 is a critical-severity vulnerability in Beijing Topsec Network Security Technology Co., Ltd. Tianxin Internet Behavior Management System, classified under OS Command Injection. CVSS score: 9.8/10. Published 2026-04-07.
How severe is CVE-2021-4473?: Critical severity. CVSS v3 base score is 9.8 out of 10.