EUVD-2026-31631
GHSA-wv7w-gprg-vf9f
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
2DescriptionCVE.org
A flaw has been found in Edimax EW-7438RPn 1.31. This impacts the function formWlSiteSurvey of the file /goform/formWlSiteSurvey of the component webs. This manipulation of the argument selSSID/submit-url causes stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been published 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 1.31 wireless range extenders allows remote authenticated attackers to corrupt memory by manipulating the selSSID or submit-url parameters in the formWlSiteSurvey handler (/goform/formWlSiteSurvey) of the embedded web server. Publicly available exploit code exists and the vendor did not respond to disclosure attempts, leaving the device without a confirmed patch. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Attacker must be able to reach the device's HTTP management interface (TCP 80/443) and must possess valid low-privilege web UI credentials (PR:L in the CVSS vector - typically the admin or guest account on the range extender). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Signals are mixed but lean toward meaningful risk for exposed devices. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has obtained low-privilege credentials to the EW-7438RPn web UI (default credentials, phishing, or LAN-side access) sends a crafted POST to /goform/formWlSiteSurvey with an oversized selSSID or submit-url parameter, overflowing the stack buffer in formWlSiteSurvey and overwriting the saved return address to redirect execution to shellcode in the request body. Publicly available exploit code exists at github.com/wudipjq/my_vuln, lowering the skill barrier substantially. … |
| Remediation | No vendor-released patch identified at time of analysis - Edimax did not respond to the researcher's disclosure attempts, so administrators cannot rely on a forthcoming firmware update. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Conduct inventory of all Edimax EW-7438RPn 1.31 devices and audit which network segments or users have administrative access to their web interface. …
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