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CVE-2026-7609— TRENDnet TEW-821DAP Firmware Udpate diagnostic tools_diagnostic os command injection

Quick assessment

Affected
TRENDnet TEW-821DAP
Exploitation
High exploitation probability; assess promptly
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是美国趋势网络（TRENDnet）公司的一款无线接入点。 TRENDnet TEW-821DAP 1.12B01及之前版本存在命令注入漏洞，该漏洞源于Firmware Udpate组件中文件/tmp/diagnostic的tools_diagnostic函数操作不当，可能导致OS命令注入。

CVSS 6.3 · Medium EPSS 4.12% · P90

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
TRENDnet TEW-821DAP 1.12B01 affected
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I. Basic Information for CVE-2026-7609

Vulnerability Information
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Vulnerability Title
TRENDnet TEW-821DAP Firmware Udpate diagnostic tools_diagnostic os command injection
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw has been found in TRENDnet TEW-821DAP up to 1.12B01. The impacted element is the function tools_diagnostic of the file /tmp/diagnostic of the component Firmware Udpate. This manipulation causes os command injection. Remote exploitation of the attack is possible. The exploit has been published and may be used. The vendor explains: "That firmware version will only work on our hardware version v1.xR. We have already EOL that product 8 years ago and are no longer selling". This vulnerability only affects products that are no longer supported by the maintainer.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
TRENDnet TEW-821DAP 命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TRENDnet TEW-821DAP是美国趋势网络（TRENDnet）公司的一款无线接入点。 TRENDnet TEW-821DAP 1.12B01及之前版本存在命令注入漏洞，该漏洞源于Firmware Udpate组件中文件/tmp/diagnostic的tools_diagnostic函数操作不当，可能导致OS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 1.12B01 cpe:2.3:o:trendnet:tew-821dap_firmware:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-7609

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III. Intelligence Information for CVE-2026-7609

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Other References for CVE-2026-7609 (1)

Same Patch Batch · TRENDnet · 2026-05-02 · 6 CVEs total

CVE-2026-7607 8.8 HIGH TRENDnet TEW-821DAP Firmware Udpate auto_update_firmware buffer overflow
CVE-2026-7608 5.5 MEDIUM TRENDnet TEW-821DAP tools_diagnostic os command injection
CVE-2026-7611 3.7 LOW TRENDnet TEW-821DAP Firmware Update cameo_dev.sh platform_do_upgrade_cameo_dev data authen
CVE-2026-7610 3.7 LOW TRENDnet TEW-821DAP Firmware Update ssi cleartext transmission
CVE-2026-7606 3.7 LOW TRENDnet TEW-821DAP Firmware Update new_gui_update_firmware data authenticity

IV. Related Vulnerabilities

Same product: TEW-821DAP
Same vendor: TRENDnet
Same weakness: CWE-78

V. Comments for CVE-2026-7609

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