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NVD Vulnerability Details :
CVE-2021-4473
Analyzed
More InfoOfficial Page
Source-disclosure@vulncheck.com
View Known Exploited Vulnerability (KEV) details
Published At-07 Apr, 2026 | 13:16
Updated At-24 Apr, 2026 | 15:12

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).

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary4.09.3CRITICAL
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary3.19.8CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Type: Secondary
Version: 4.0
Base score: 9.3
Base severity: CRITICAL
Vector:
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Type: Primary
Version: 3.1
Base score: 9.8
Base severity: CRITICAL
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CPE Matches
topsecgroup
topsecgroup
>>tianxin_internet_behavior_management_system>>Versions before 4.0.0.7_20210716.180815(exclusive)
cpe:2.3:a:topsecgroup:tianxin_internet_behavior_management_system:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-78Primarydisclosure@vulncheck.com
CWE ID: CWE-78
Type: Primary
Source: disclosure@vulncheck.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://avd.aliyun.com/detail?id=AVD-2021-890232disclosure@vulncheck.com
Third Party Advisory
https://cn-sec.com/archives/4631959.htmldisclosure@vulncheck.com
Exploit
Third Party Advisory
https://www.cnvd.org.cn/flaw/show/CNVD-2021-41972disclosure@vulncheck.com
Third Party Advisory
https://www.cnvd.org.cn/patchInfo/show/280166disclosure@vulncheck.com
Patch
https://www.vulncheck.com/advisories/tianxin-internet-behavior-management-system-command-injection-via-toquery-phpdisclosure@vulncheck.com
Third Party Advisory
VDB Entry
Hyperlink: https://avd.aliyun.com/detail?id=AVD-2021-890232
Source: disclosure@vulncheck.com
Resource:
Third Party Advisory
Hyperlink: https://cn-sec.com/archives/4631959.html
Source: disclosure@vulncheck.com
Resource:
Exploit
Third Party Advisory
Hyperlink: https://www.cnvd.org.cn/flaw/show/CNVD-2021-41972
Source: disclosure@vulncheck.com
Resource:
Third Party Advisory
Hyperlink: https://www.cnvd.org.cn/patchInfo/show/280166
Source: disclosure@vulncheck.com
Resource:
Patch
Hyperlink: https://www.vulncheck.com/advisories/tianxin-internet-behavior-management-system-command-injection-via-toquery-php
Source: disclosure@vulncheck.com
Resource:
Third Party Advisory
VDB Entry
Change History
0Changes found
Details not found