Authenticated code execution via unchecked stack copy
Published May 25, 2026 · Updated May 25, 2026
Stack-based buffer overflow in Edimax EW-7438RPn 1.31 allows remote authenticated users to execute code via submit-url. The formRadius handler copies the attacker-controlled parameter into a stack-local buffer without a length check, overwriting the function return address. A low-privilege web-management session and network access to /goform/formRadius are required; the published proof of concept crashes the device.
Summary
What happened
Stack-based buffer overflow in Edimax EW-7438RPn 1.31 allows remote authenticated users to execute code via submit-url. The formRadius handler copies the attacker-controlled parameter into a stack-local buffer without a length check, overwriting the function return address. A low-privilege web-management session and network access to /goform/formRadius are required; the published proof of concept crashes the device.
The record
- CVE
- CVE-2026-9461
- Published
- May 25, 2026
- Updated
- May 25, 2026
- Vendor
- Edimax Technology Co., Ltd.
- Product
- EW-7438RPn
- Classifications
- CWE-121, CWE-119, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- May 25, 2026CVE publishedPublication date reported by the CVE source.
- May 25, 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=1.31
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
- EW-7438RPn formRadius crash proof of conceptproof of concept · demonstrated
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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