EUVD-2026-40074
GHSA-2fx5-835p-hm49
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
Network-reachable web handler (AV:N/AC:L) requiring authenticated low-privilege access (PR:L); memory corruption yields full code-execution impact, so C/I/A:H.
Primary rating from Vendor (vuldb).
CVSS VectorVendor: vuldb
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
1DescriptionCVE.org
A vulnerability has been found in Edimax EW-7478APC 1.04. This impacts the function formL2TPSetup of the file /goform/formL2TPSetup of the component POST Request Handler. Such manipulation of the argument L2TPUserName leads to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public 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 the Edimax EW-7478APC (firmware 1.04) wireless access point lets an authenticated remote attacker corrupt memory by sending an oversized L2TPUserName argument to the formL2TPSetup handler at /goform/formL2TPSetup. Publicly available exploit code exists, though it is not listed in CISA KEV and carries a CVSS 4.0 base score of 7.4. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires network reachability to the device's HTTP management interface and authenticated access at low privilege (CVSS PR:L) to reach the formL2TPSetup handler; the attacker then submits a POST request to /goform/formL2TPSetup with an oversized L2TPUserName argument. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Signals are mixed. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has obtained valid low-privilege web credentials (or finds the management interface protected only by default/weak credentials) sends a crafted POST request to /goform/formL2TPSetup with an overlong L2TPUserName value, overflowing the stack buffer in formL2TPSetup. This corrupts the saved return address and can crash the device or, with a tailored payload, achieve code execution on the access point. … |
| Remediation | No vendor-released patch identified at time of analysis - the vendor was contacted before disclosure and did not respond, so no fixed firmware version exists to cite. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
24 hours: Identify and inventory all Edimax EW-7478APC devices running firmware 1.04; immediately restrict administrative access to trusted personnel and networks only; disable remote management where not required. …
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Same weakness CWE-119 – Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
Leaving vuln.today