EUVD-2026-31653
GHSA-vrwj-7pfm-fv87
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 weakness has been identified in Edimax BR-6478AC 1.23. This affects the function formiNICSiteSurvey of the file /goform/formiNICSiteSurvey of the component POST Request Handler. Executing a manipulation of the argument selSSID can lead to buffer overflow. The attack can be launched remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
AnalysisAI
Stack/buffer overflow in the Edimax BR-6478AC 1.23 wireless router's web management interface allows authenticated remote attackers to corrupt memory by submitting an oversized selSSID parameter to /goform/formiNICSiteSurvey, with publicly available exploit code exists and no vendor response to coordinated disclosure. The flaw affects the formiNICSiteSurvey POST request handler and yields high impact on confidentiality, integrity, and availability of the device. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must reach TCP access to the BR-6478AC web administration interface and hold valid low-privileged web UI credentials (CVSS PR:L) - in practice the single admin account, which on consumer routers is frequently the unchanged factory default. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 4.0 scores this 7.4 (High) with AV:N/AC:L/AT:N/PR:L/UI:N and high CIA impact - network reachable, low complexity, but requires low-privilege authentication (PR:L), meaning an attacker must have valid web UI credentials (often the default admin account on consumer routers). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has reached the router's web interface - for example via a LAN foothold, a misconfigured WAN-exposed admin port, or default/weak credentials commonly left on consumer routers - authenticates and sends a crafted POST request to /goform/formiNICSiteSurvey containing an overlong selSSID value, triggering the buffer overflow in the handler. A public exploit write-up is hosted on Notion describing the vulnerable parameter, lowering the barrier to weaponization for arbitrary code execution or persistent denial of service on the device. … |
| Remediation | No vendor-released patch identified at time of analysis - Edimax did not respond to coordinated disclosure per the VulDB report, so users of BR-6478AC firmware 1.23 should assume the issue is unpatched and apply compensating controls. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Scan for and inventory all Edimax BR-6478AC v1.23 units in production; disable remote management access from untrusted networks and restrict local admin interface access to whitelisted IP addresses. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
Share
External POC / Exploit Code
Leaving vuln.today