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Description

A security vulnerability has been detected in Edimax BR-6478AC 1.23. This vulnerability affects the function formL2TPSetup of the file /goform/formL2TPSetup of the component POST Request Handler. The manipulation of the argument L2TPUserName leads to buffer overflow. The attack may be initiated remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

PUBLISHED Reserved 2026-05-24 | Published 2026-05-25 | Updated 2026-05-26 | Assigner VulDB




HIGH: 8.7CVSS: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
HIGH: 8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
HIGH: 8.8CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
9.0AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR

Problem types

Buffer Overflow

Memory Corruption

Product status

1.23
affected

Timeline

2026-05-24:Advisory disclosed
2026-05-24:VulDB entry created
2026-05-24:VulDB entry last update

Credits

wxhwxhwxh_mie (VulDB User) reporter

VulDB CNA Team coordinator

References

vuldb.com/vuln/365424 (VDB-365424 | Edimax BR-6478AC POST Request formL2TPSetup buffer overflow) vdb-entry technical-description

vuldb.com/vuln/365424/cti (VDB-365424 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/submit/818452 (Submit #818452 | Edimax BR6478ACV2 BR6478ACV2_v1.23 Buffer Overflow) third-party-advisory

lavender-bicycle-a5a.notion.site/...cc5d92e?source=copy_link exploit

cve.org (CVE-2026-9443)

nvd.nist.gov (CVE-2026-9443)

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