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CVE-2026-9343 Edimax CVE debrief

A command injection vulnerability exists in Edimax EW-7438RPn wireless range extenders running firmware up to version 1.31. The vulnerability resides in the formWpsStart function within the /goform/formWpsStart endpoint of the device's web server (webs). The pinCode parameter is not properly sanitized, allowing an authenticated attacker to inject arbitrary operating system commands. Successful exploitation could result in unauthorized command execution on the affected device. The vulnerability has a CVSS 4.0 base score of 2.1 (LOW severity) with the vector AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L, indicating network-based attack with low complexity, requiring low privileges, and resulting in low impacts to confidentiality, integrity, and availability. The exploit has been publicly disclosed, and the vendor was reportedly contacted but did not respond. The CVE was published on 2026-05-23 and last modified on 2026-05-26.

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

Who should care

Organizations deploying Edimax EW-7438RPn range extenders in enterprise or home office environments; network administrators responsible for IoT device security; security teams monitoring for command injection attacks against edge network devices

Technical summary

The Edimax EW-7438RPn wireless range extender contains an OS command injection vulnerability in its WPS configuration handler. The formWpsStart function in /goform/formWpsStart fails to properly validate the pinCode parameter before passing it to shell execution functions. An attacker with low-privileged network access can inject arbitrary commands through this parameter. The vulnerability affects firmware versions up to and including 1.31. The device uses the 'webs' HTTP server component, which exposes this functionality without adequate input sanitization.

Defensive priority

medium

Recommended defensive actions

  • Apply network segmentation to isolate affected Edimax EW-7438RPn devices from critical infrastructure
  • Restrict administrative access to the device management interface to trusted hosts only
  • Monitor for suspicious requests to /goform/formWpsStart containing unusual pinCode parameter values
  • Consider discontinuing use of affected firmware versions pending vendor patch availability
  • Review device logs for indicators of unauthorized command execution

Evidence notes

Vulnerability identified in Edimax EW-7438RPn firmware ≤1.31 via formWpsStart function in /goform/formWpsStart. CWE-77 and CWE-78 (Command Injection) assigned. CVSS 4.0 score 2.1 (LOW). Exploit publicly available per Vuldb disclosure.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-9343 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-9343

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

  • CVE-2026-9343 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-9343

    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.