# CVE-2026-129250: Edimax BR6478ACV2 webs formPPTPSetup buffer overflow

Status: published. Published: 2026-11-14. Updated: 2026-11-14.

A security vulnerability has been detected in Edimax BR6478ACV2 1.23. The impacted element is the function formPPTPSetup of the file webs. The manipulation of the argument pptpUserName leads to buffer overflow. It is possible to initiate the attack 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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Edimax / BR6478ACV2: 1.23 (affected). Source: CNA: VulDB

## Severity and prioritization

- CVSS 4.0: 9.4 (critical); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P; source: CNA: VulDB

- CVSS 3.1: 9.9 (critical); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:C; source: CNA: VulDB

- CVSS 3.0: 9.9 (critical); CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:C; source: CNA: VulDB

- CVSS 2.0: 9 (critical); AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:C; source: CNA: VulDB

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-120, CWE-119

## Exploit evidence

- exploit: https://lavender-bicycle-a5a.notion.site/EDIMAX-BR6478ACV2-formPPTPSetup-3f953a41781f8017b959ec7b4df6b3ad?source=copy_link (CNA: VulDB)

## References

- https://vuldb.com/vuln/437280 (CNA: VulDB; vdb-entry, technical-description)

- https://vuldb.com/vuln/437280/cti (CNA: VulDB; signature, permissions-required)

- https://vuldb.com/cve/CVE-2026-129250 (CNA: VulDB; third-party-advisory)

- https://vuldb.com/submit/1033650 (CNA: VulDB; third-party-advisory)

- https://lavender-bicycle-a5a.notion.site/EDIMAX-BR6478ACV2-formPPTPSetup-3f953a41781f8017b959ec7b4df6b3ad?source=copy_link (CNA: VulDB; exploit)

## Provenance

- CNA: VulDB: https://www.cve.org/CVERecord?id=CVE-2026-129250; retrieved 2026-11-14; source updated 2026-11-14

Revision: c6cb1ae2159a1f5e583773a23f85e2c3dc939b28f3c2ea35429e6413d8af4da4

Canonical: https://y2.dev/cve/CVE-2026-129250

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