CVE-2026-9403: Buffer Overflow in Edimax BR-6675nD
CVE-2026-9403 is a high-severity buffer overflow vulnerability in the Edimax BR-6675nD router firmware version 1. 12. It occurs in the formWlSiteSurvey function of the POST request handler when processing the selSSID argument. The vulnerability can be exploited remotely without user interaction. The exploit has been publicly disclosed, but no official vendor response or patch is available at this time.
AI Analysis
Technical Summary
This vulnerability involves a buffer overflow triggered by manipulating the selSSID argument in the formWlSiteSurvey function within the POST request handler of Edimax BR-6675nD firmware version 1.12. The flaw allows remote attackers to potentially execute arbitrary code or cause denial of service due to improper handling of input data. The vulnerability has a CVSS 4.0 base score of 8.7, indicating high severity with network attack vector, low attack complexity, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability. The vendor has not responded to the disclosure, and no patch or mitigation has been provided.
Potential Impact
Successful exploitation of this buffer overflow vulnerability could allow remote attackers to execute arbitrary code or disrupt the device's normal operation, impacting confidentiality, integrity, and availability of the affected router. Given the high CVSS score and remote attack vector, the risk to affected devices is significant. However, there are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since the vendor has not responded and no official fix is available, users should consider mitigating exposure by restricting network access to the affected device, disabling vulnerable services if possible, or replacing the device with a secure alternative until a patch is released.
CVE-2026-9403: Buffer Overflow in Edimax BR-6675nD
Description
CVE-2026-9403 is a high-severity buffer overflow vulnerability in the Edimax BR-6675nD router firmware version 1. 12. It occurs in the formWlSiteSurvey function of the POST request handler when processing the selSSID argument. The vulnerability can be exploited remotely without user interaction. The exploit has been publicly disclosed, but no official vendor response or patch is available at this time.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a buffer overflow triggered by manipulating the selSSID argument in the formWlSiteSurvey function within the POST request handler of Edimax BR-6675nD firmware version 1.12. The flaw allows remote attackers to potentially execute arbitrary code or cause denial of service due to improper handling of input data. The vulnerability has a CVSS 4.0 base score of 8.7, indicating high severity with network attack vector, low attack complexity, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability. The vendor has not responded to the disclosure, and no patch or mitigation has been provided.
Potential Impact
Successful exploitation of this buffer overflow vulnerability could allow remote attackers to execute arbitrary code or disrupt the device's normal operation, impacting confidentiality, integrity, and availability of the affected router. Given the high CVSS score and remote attack vector, the risk to affected devices is significant. However, there are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since the vendor has not responded and no official fix is available, users should consider mitigating exposure by restricting network access to the affected device, disabling vulnerable services if possible, or replacing the device with a secure alternative until a patch is released.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-05-24T06:24:21.068Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a1381c4a5ae1af1aaf671c0
Added to database: 5/24/2026, 10:55:00 PM
Last enriched: 5/24/2026, 11:09:52 PM
Last updated: 5/25/2026, 2:37:32 AM
Views: 17
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