EUVD-2026-33485
GHSA-cvrm-g72g-prqf
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
5DescriptionCVE.org
A vulnerability was identified in Edimax BR-6478AC 1.23. The impacted element is the function formWanTcpipSetup of the file /goform/formWanTcpipSetup of the component POST Request Handler. Such manipulation of the argument pppUserName leads to stack-based buffer overflow. The attack may be performed from remote. The exploit is publicly available and might be used.
AnalysisAI
Stack-based buffer overflow in the Edimax BR-6478AC 1.23 wireless router enables authenticated remote attackers to corrupt memory by sending a crafted pppUserName parameter to the /goform/formWanTcpipSetup endpoint. Publicly available exploit code exists (published via VulDB and a Notion writeup), elevating this from a theoretical issue to a practical threat, though no CISA KEV listing or active exploitation has been confirmed. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Attacker requires authenticated access to the router's web management interface (CVSS PR:L) and network reachability to the HTTP admin endpoint /goform/formWanTcpipSetup - typically LAN-side on default deployments, but exploitable from the internet if remote/WAN administration has been enabled. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Risk signals are mixed and require careful weighting. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with low-privilege credentials to the router's web interface - obtained via default credentials, credential stuffing, phishing of the home/office user, or lateral movement from a compromised LAN host - sends a POST request to /goform/formWanTcpipSetup with an over-long pppUserName parameter, overflowing the stack buffer to overwrite the saved return address and pivot execution into attacker-controlled shellcode. Publicly available exploit code lowers the skill barrier; successful exploitation yields code execution as the web daemon (typically root on embedded routers), enabling DNS hijacking, traffic interception, persistent botnet implantation, or pivoting deeper into the LAN. |
| Remediation | No vendor-released patch identified at time of analysis - Edimax has not published a fixed firmware version in the available references. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify and inventory all Edimax BR-6478AC v1.23 routers deployed across your infrastructure. …
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External POC / Exploit Code
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