EUVD-2026-31556
GHSA-ccvm-7xq8-8rx8
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
3DescriptionCVE.org
A security vulnerability has been detected in Edimax EW-7438RPn up to 1.31. The impacted element is an unknown function of the file /goform/formWpsStart of the component webs. Such manipulation of the argument pinCode/wlan-url leads to stack-based buffer overflow. The attack can be executed remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
AnalysisAI
Stack-based buffer overflow in Edimax EW-7438RPn WiFi range extender firmware up to version 1.31 allows authenticated remote attackers to crash or execute code on the device by sending malicious input to the WPS configuration interface. The vulnerability occurs when processing the pinCode or wlan-url parameters in /goform/formWpsStart, with publicly available exploit code on GitHub demonstrating the attack.
Technical ContextAI
The Edimax EW-7438RPn is a WiFi range extender/repeater device. The vulnerability exists in the web management interface component (webs) that handles WPS (WiFi Protected Setup) configuration. The root cause is a classic stack-based buffer overflow (CWE-121) where user-supplied input to the pinCode or wlan-url parameters is copied to a fixed-size buffer without proper bounds checking, allowing memory corruption beyond the allocated stack space.
RemediationAI
No vendor-released patch identified at time of analysis, as Edimax reportedly did not respond to the disclosure. Primary mitigation: Restrict access to the device's web management interface by implementing network segmentation and firewall rules to block external access to the administration ports. Configure strong authentication credentials if not already implemented. Consider replacing the device with a supported alternative if the management interface must remain accessible, as the lack of vendor response suggests no fix is forthcoming.
More in Ew 7438Rpn
View allBuffer overflow in Edimax EW-7438RPn WiFi range extender firmware up to version 1.31 enables authenticated remote attack
Buffer overflow in Edimax EW-7438RPn WiFi range extender firmware versions up to 1.31 enables authenticated remote attac
Stack-based buffer overflow in the Edimax EW-7438RPn 1.31 wireless range extender allows remote attackers with low-privi
Stack-based buffer overflow in the Edimax EW-7438RPn Wi-Fi range extender (firmware 1.31) allows remote authenticated at
Stack-based buffer overflow in the Edimax EW-7438RPn 1.31 Wi-Fi range extender allows remote attackers with low privileg
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Stack-based buffer overflow in the Edimax EW-7438RPn 1.31 range extender allows remote authenticated attackers to corrup
Stack-based buffer overflow in the Edimax EW-7438RPn 1.31 wireless range extender enables remote low-privileged attacker
Stack-based buffer overflow in the Edimax EW-7438RPn Wi-Fi range extender (firmware 1.31) allows remote authenticated at
Stack-based buffer overflow in Edimax EW-7438RPn 1.31 range extenders allows authenticated remote attackers to corrupt m
Stack-based buffer overflow in the Edimax EW-7438RPn 1.31 wireless range extender allows remote attackers with low privi
Stack-based buffer overflow in Edimax EW-7438RPn 1.31 wireless range extenders allows remote authenticated attackers to
Same weakness CWE-121 – Stack-based Buffer Overflow
View allSame technique Stack Overflow
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External POC / Exploit Code
Leaving vuln.today