CVE-2026-4354: trendnet tew-824dru_firmware Cross-site Scripting

Vulnerability summary

CVE-2026-4354 is a medium (CVSS 5.1) Cross-site Scripting vulnerability in trendnet tew-824dru_firmware. EPSS estimates a 0.34% chance of exploitation in the next 30 days, higher than 26.5% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 17-03-2026
   PublishedVulnerability first disclosed.
2. 18-03-2026
   Last modifiedVulnerability information updated.

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.

• CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
• CWE-94Improper Control of Generation of Code ('Code Injection')The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.