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CVE-2021-4473

CRITICAL

9.8

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).

CVE Details

CVSS v3.1 Score9.8

SeverityCRITICAL

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published4/7/2026

Last Modified4/7/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-78

References

https://avd.aliyun.com/detail?id=AVD-2021-890232(disclosure@vulncheck.com)

https://cn-sec.com/archives/4631959.html(disclosure@vulncheck.com)

https://www.cnvd.org.cn/flaw/show/CNVD-2021-41972(disclosure@vulncheck.com)

https://www.cnvd.org.cn/patchInfo/show/280166(disclosure@vulncheck.com)

https://www.vulncheck.com/advisories/tianxin-internet-behavior-management-system-command-injection-via-toquery-php(disclosure@vulncheck.com)

IOC Correlations

No correlations recorded

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