Authenticated memory corruption via unchecked selSSID copy
Published May 24, 2026 · Updated May 24, 2026
Buffer overflow in the formWlSiteSurvey handler in Edimax BR-6675nD 1.12 allows remote authenticated users to corrupt router memory. The handler copies the attacker-controlled selSSID POST field into a destination buffer without confirming that the input fits. Low-privileged access to the web management interface is required; public material does not establish whether the demonstrated result is a crash or code execution.
Summary
What happened
Buffer overflow in the formWlSiteSurvey handler in Edimax BR-6675nD 1.12 allows remote authenticated users to corrupt router memory. The handler copies the attacker-controlled selSSID POST field into a destination buffer without confirming that the input fits. Low-privileged access to the web management interface is required; public material does not establish whether the demonstrated result is a crash or code execution.
The record
- CVE
- CVE-2026-9403
- Published
- May 24, 2026
- Updated
- May 24, 2026
- Vendor
- Edimax Technology Co., Ltd.
- Product
- BR-6675nD
- Classifications
- CWE-119, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- May 24, 2026CVE publishedPublication date reported by the CVE source.
- May 24, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=1.12
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- EDIMAX BR-6675nD formWlSiteSurvey proof of conceptproof of concept · unverified
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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