Authenticated memory corruption via unchecked username append
Published May 31, 2026 · Updated May 31, 2026
Stack-based buffer overflow in Edimax BR-6478AC 1.23 allows remote authenticated users to corrupt memory via a crafted POST request. The formWanTcpipSetup handler passes the attacker-controlled pppUserName value to strcat(), appending it to a stack buffer without a length check. Low-privileged management access is required, and the published proof of concept sends 5,000 bytes to trigger the corruption.
Summary
What happened
Stack-based buffer overflow in Edimax BR-6478AC 1.23 allows remote authenticated users to corrupt memory via a crafted POST request. The formWanTcpipSetup handler passes the attacker-controlled pppUserName value to strcat(), appending it to a stack buffer without a length check. Low-privileged management access is required, and the published proof of concept sends 5,000 bytes to trigger the corruption.
The record
- CVE
- CVE-2026-10165
- Published
- May 31, 2026
- Updated
- May 31, 2026
- Vendor
- Edimax Technology Co., Ltd.
- Product
- BR-6478AC
- Classifications
- CWE-119, CWE-121, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- May 31, 2026CVE publishedPublication date reported by the CVE source.
- May 31, 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=1.23
What conditions does exploitation require?
What is affected?
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 BR6478ACV2 formWanTcpipSetup proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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