Authenticated code execution via unchecked stack copy
Published May 24, 2026 · Updated May 24, 2026
Stack-based buffer overflow in Edimax EW-7438RPn 1.31 and earlier allows remote authenticated users to crash the device via HTTP. The webs formWizSurvey handler copies oversized ssid, manualssid, ip, mask, or gateway values into a stack-local buffer without length checks, overwriting its return address. Access to the Basic-authenticated management endpoint is required; the published request demonstrates persistent service interruption, while return-address control enables arbitrary code execution.
Summary
What happened
Stack-based buffer overflow in Edimax EW-7438RPn 1.31 and earlier allows remote authenticated users to crash the device via HTTP. The webs formWizSurvey handler copies oversized ssid, manualssid, ip, mask, or gateway values into a stack-local buffer without length checks, overwriting its return address. Access to the Basic-authenticated management endpoint is required; the published request demonstrates persistent service interruption, while return-address control enables arbitrary code execution.
The record
- CVE
- CVE-2026-9345
- Published
- May 24, 2026
- Updated
- May 24, 2026
- Vendor
- Edimax Technology Co., Ltd.
- Product
- EW-7438RPn
- Classifications
- CWE-120, CWE-119, T1210
- 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=1.0
- Affected versionversion=1.1
- Affected versionversion=1.10
- Affected versionversion=1.11
- Affected versionversion=1.12
- Affected versionversion=1.13
- Affected versionversion=1.14
- Affected versionversion=1.15
- Affected versionversion=1.16
- Affected versionversion=1.17
- Affected versionversion=1.18
- Affected versionversion=1.19
- Affected versionversion=1.2
- Affected versionversion=1.20
- Affected versionversion=1.21
- Affected versionversion=1.22
- Affected versionversion=1.23
- Affected versionversion=1.24
- Affected versionversion=1.25
- Affected versionversion=1.26
- Affected versionversion=1.27
- Affected versionversion=1.28
- Affected versionversion=1.29
- Affected versionversion=1.3
- Affected versionversion=1.30
- Affected versionversion=1.31
- Affected versionversion=1.4
- Affected versionversion=1.5
- Affected versionversion=1.6
- Affected versionversion=1.7
- Affected versionversion=1.8
- Affected versionversion=1.9
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
- EW-7438RPn formWizSurvey 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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