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CVE-2026-76582— TRENDnet TEW-821DAP ssi ping.cgi system command injection

Quick assessment

Affected
TRENDnet TEW-821DAP
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

TRENDnet tew-821dap firmware是美国TRENDnet公司的一套无线接入点固件更新程序。 TRENDnet tew-821dap firmware 2.2.01b05版本存在安全漏洞，该漏洞源于ssi组件/cgi-bin/ping.cgi文件中popen/system函数对ipaddr参数操作不当，可能导致命令注入。

CVSS 7.4 · High EPSS 1.77% · P77

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
TRENDnet TEW-821DAP 2.2.01b05 affected
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I. Basic Information for CVE-2026-76582

Vulnerability Information
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Vulnerability Title
TRENDnet TEW-821DAP ssi ping.cgi system command injection
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was determined in TRENDnet TEW-821DAP 2.2.01b05. Affected is the function popen/system of the file /cgi-bin/ping.cgi of the component ssi. Executing a manipulation of the argument ipaddr can lead to command injection. It is possible to launch the attack remotely. The exploit has been publicly disclosed and may be utilized.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
在命令中使用的特殊元素转义处理不恰当(命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
TRENDnet tew-821dap firmware 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TRENDnet tew-821dap firmware是美国TRENDnet公司的一套无线接入点固件更新程序。 TRENDnet tew-821dap firmware 2.2.01b05版本存在安全漏洞，该漏洞源于ssi组件/cgi-bin/ping.cgi文件中popen/system函数对ipaddr参数操作不当，可能导致命令注入。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
TRENDnet TEW-821DAP 2.2.01b05 cpe:2.3:o:trendnet:tew-821dap_firmware:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-76582

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 9687 chars
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III. Intelligence Information for CVE-2026-76582

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Proof of Concept for CVE-2026-76582 (1)

Security Blog Posts for CVE-2026-76582 (1)

News Coverage for CVE-2026-76582 (1)

Other References for CVE-2026-76582 (1)

Same Patch Batch · TRENDnet · 2026-08-19 · 8 CVEs total

CVE-2026-76584 9.9 CRITICAL TRENDnet TV-IP751WIC alphapd set_time.cgi stack-based overflow
CVE-2026-76589 9.9 CRITICAL TRENDnet TEW-755AP mycli FUN_401000 stack-based overflow
CVE-2026-76590 9.9 CRITICAL TRENDnet TEW-755AP ssi wan.cgi stack-based overflow
CVE-2026-75984 7.4 HIGH TRENDnet TEW-823DRU admin.cgi command injection
CVE-2026-75985 7.4 HIGH TRENDnet Router ping.cgi command injection
CVE-2026-76583 7.4 HIGH TRENDnet TV-IP751WIC alphapd set_time.cgi command injection
CVE-2026-76591 7.4 HIGH TRENDnet TEW-755AP ssi email.cgi log_email_server command injection

IV. Related Vulnerabilities

Same product: TEW-821DAP
Same vendor: TRENDnet
Same weakness: CWE-77

V. Comments for CVE-2026-76582

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