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CVE-2026-4354— TRENDnet TEW-824DRU Web apply_sec.cgi sub_420A78 cross site scripting

Quick assessment

Affected
TRENDnet TEW-824DRU
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

TRENDnet TEW-824DRU是美国趋势网络（TRENDnet）公司的一款双频无线路由器。 TRENDnet TEW-824DRU 1.010B01版本和1.04B01版本存在代码注入漏洞，该漏洞源于apply_sec.cgi文件中sub_420A78函数对Language参数操作不当，可能导致跨站脚本攻击。

CVSS 3.5 · Low EPSS 0.33% · P24
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I. Basic Information for CVE-2026-4354

Vulnerability Information
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Vulnerability Title
TRENDnet TEW-824DRU Web apply_sec.cgi sub_420A78 cross site scripting
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was identified in TRENDnet TEW-824DRU 1.010B01/1.04B01. The impacted element is the function sub_420A78 of the file apply_sec.cgi of the component Web Interface. Such manipulation of the argument Language leads to cross site scripting. It is possible to launch the attack remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
TRENDnet TEW-824DRU 代码注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TRENDnet TEW-824DRU是美国趋势网络（TRENDnet）公司的一款双频无线路由器。 TRENDnet TEW-824DRU 1.010B01版本和1.04B01版本存在代码注入漏洞，该漏洞源于apply_sec.cgi文件中sub_420A78函数对Language参数操作不当，可能导致跨站脚本攻击。
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-824DRU 1.010B01 cpe:2.3:o:trendnet:tew-824dru_firmware:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-4354

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III. Intelligence Information for CVE-2026-4354

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Vendor Advisories for CVE-2026-4354 (2)

Other References for CVE-2026-4354 (1)

IV. Related Vulnerabilities

Same vendor: TRENDnet
Same weakness: CWE-79

V. Comments for CVE-2026-4354

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