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PatchSiren cyber security CVE debrief

CVE-2026-9362 Edimax CVE debrief

A command injection vulnerability exists in Edimax EW-7438RPn firmware version 1.12, specifically within the `formConnectionSetting` function of the `/goform/formConnectionSetting` endpoint. The vulnerability stems from improper sanitization of the `max_Conn` and `timeOut` parameters, allowing remote attackers to inject arbitrary commands. The CVSS 4.0 vector indicates network attack vector with low attack complexity, low privileges required, and no user interaction needed, with partial impacts to confidentiality, integrity, and availability. The exploit has been publicly disclosed, and the vendor was reportedly contacted without response. The vulnerability is classified under CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component) and CWE-77 (Improper Neutralization of Special Elements used in a Command).

Vendor
Edimax
Product
EW-7438RPn
CVSS
LOW 2.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-05-24
Original CVE updated
2026-07-23
Advisory published
2026-05-24
Advisory updated
2026-07-23

Who should care

Network administrators managing Edimax EW-7438RPn wireless range extenders, SOHO network operators, IoT security teams, and organizations with these devices deployed in guest or isolated network segments.

Technical summary

The vulnerability resides in the Setting Handler component's formConnectionSetting function, accessible via the /goform/formConnectionSetting endpoint. The max_Conn and timeOut parameters are passed to underlying system commands without adequate input validation or sanitization, enabling command injection. Attackers with low-privileged network access can exploit this remotely to execute arbitrary commands on the device.

Defensive priority

medium

Recommended defensive actions

  • Restrict network access to the router's administrative interface to trusted management networks only
  • Implement network segmentation to isolate affected devices from critical infrastructure
  • Monitor for anomalous HTTP POST requests to /goform/formConnectionSetting containing shell metacharacters
  • Apply firmware updates from Edimax if and when released, or consider replacement of end-of-life devices
  • Review and disable remote administration features if not strictly required

Evidence notes

Primary evidence sourced from NVD modified feed with VulDB as CNA. Notion-hosted disclosure document and VulDB entries provide technical details. CPE criteria not populated in source data.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-9362 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-9362

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-9362 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-9362

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.