Which versions of Edimax BR-6478AC are affected by EUVD-2026-33482?

Edimax BR-6478AC wireless routers contain a memory corruption vulnerability with publicly available exploit code that attackers with low-level credentials could leverage to compromise network…

Is there a public PoC exploit available for EUVD-2026-33482?

Yes, a public proof-of-concept exploit is available for EUVD-2026-33482. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate EUVD-2026-33482?

Within 24 hours: Inventory all Edimax BR-6478AC v1.23 routers and restrict network access to administrative interfaces via firewall rules and network segmentation. Within 7 days: Disable USB Account management functionality if not operationally required; implement additional access controls to limit low-level credential provisioning. Within 30 days: Isolate affected routers on restricted network segments; establish vendor monitoring schedule or device replacement timeline.

Edimax BR-6478AC EUVD-2026-33482

Q: What is the CVSS score of EUVD-2026-33482?

EUVD-2026-33482 has a CVSS 4.0 base score of 7.4 (High). CVSS vector: 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. EPSS exploitation probability: 0.0%.

| CVE-2026-10163 HIGH

Classic Buffer Overflow (CWE-120)

2026-05-31 VulDB

GHSA-pxj4-7p26-956c

Buffer Overflow Br 6478Ac

7.4

CVSS 4.0 · Vendor: VulDB

Severity by source

Vendor (VulDB) PRIMARY

7.4 HIGH

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 Vendor (VulDB) · only source for this CVE.

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Lifecycle Timeline

Analysis Updated

May 31, 2026 - 04:30 vuln.today

v3 (cvss_changed)

Analysis Updated

May 31, 2026 - 04:30 vuln.today

v2 (cvss_changed)

Re-analysis Queued

May 31, 2026 - 04:22 vuln.today

cvss_changed

CVSS changed

May 31, 2026 - 04:22 NVD

8.8 (HIGH) 7.4 (HIGH)

Analysis Generated

May 31, 2026 - 03:58 vuln.today

DescriptionCVE.org

A vulnerability has been found in Edimax BR-6478AC 1.23. This issue affects the function formUSBAccount of the file /goform/formUSBAccount of the component POST Request Handler. The manipulation of the argument UserName/Password leads to buffer overflow. Remote exploitation of the attack is possible. The exploit has been disclosed to the public and may be used.

AnalysisAI

Buffer overflow in the Edimax BR-6478AC v1.23 wireless router allows authenticated remote attackers to corrupt memory by sending oversized UserName or Password values to the /goform/formUSBAccount endpoint. Publicly available exploit code exists for this issue, raising the practical risk despite the requirement for low-level credentials, though no active exploitation has been confirmed via CISA KEV.

Technical ContextAI

The vulnerability resides in the formUSBAccount handler within the router's embedded HTTP administration interface (goform CGI framework), commonly implemented in Realtek/Broadcom SDK-based consumer routers using fixed-size stack buffers for processing form parameters. CWE-120 (Classic Buffer Overflow / 'Buffer Copy without Checking Size of Input') indicates the function copies attacker-controlled UserName and Password POST parameters into undersized buffers without bounds validation, enabling memory corruption that on MIPS/ARM embedded systems can lead to stack smashing, return address overwrite, and potential code execution depending on the presence of mitigations like NX or ASLR (which are typically absent on consumer SOHO routers). The CPE cpe:2.3:a:edimax:br-6478ac:*:*:*:*:*:*:*:* identifies all firmware versions of the BR-6478AC AC1200 dual-band gigabit router as in scope, though the description specifically cites version 1.23.

RemediationAI

No vendor-released patch identified at time of analysis - the Edimax BR-6478AC reached end-of-sale years ago and the VulDB entry (https://vuldb.com/vuln/367416) and exploit writeup do not cite a fixed firmware release. Defenders should disable remote (WAN-side) management of the router web interface to remove internet-exposed attack surface, restrict LAN access to the /goform/formUSBAccount endpoint via segmenting the management network or placing the router behind a firewall that filters HTTP/HTTPS to its administrative IP, and change default admin credentials to long random passwords to make the PR:L precondition harder to satisfy. Where possible, replace the device with a vendor-supported model since unpatched buffer overflows in embedded admin handlers commonly become the entry point for IoT botnets; the side effect of disabling remote management is loss of off-network administration convenience.