High severity · published May 25, 2026
CVE-2026-9443
Edimax BR-6478AC POST Request formL2TPSetup buffer overflow
8.8
CVSS
0.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 48% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BR
BR-6478AC · Edimax
1.23 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-9443
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-9443
lavender-bicycle-a5a.notion.site
https://lavender-bicycle-a5a.notion.site/EDIMAX-BR6478ACV2-formL2TPSetup-34b53a41781f809e9c30c1260cc5d92e?source=copy_link
vuldb.com
https://vuldb.com/submit/818452
vuldb.com
https://vuldb.com/vuln/365424
vuldb.com
https://vuldb.com/vuln/365424/cti
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