Authenticated memory corruption via oversized index parameter
Published Mar 12, 2026 · Updated Mar 12, 2026
Stack-based buffer overflow in the POST handler in Tenda W3 1.0.0.3(2204) allows remote authenticated users to corrupt process memory. The formwrlSSIDget function processes the index parameter for /goform/wifiSSIDget without enforcing the destination stack buffer's bounds. Low-privilege access to the web interface is required, and an oversized index value corrupts the handler's stack memory, interrupting or redirecting its execution.
Summary
What happened
Stack-based buffer overflow in the POST handler in Tenda W3 1.0.0.3(2204) allows remote authenticated users to corrupt process memory. The formwrlSSIDget function processes the index parameter for /goform/wifiSSIDget without enforcing the destination stack buffer's bounds. Low-privilege access to the web interface is required, and an oversized index value corrupts the handler's stack memory, interrupting or redirecting its execution.
The record
- CVE
- CVE-2026-4007
- Published
- Mar 12, 2026
- Updated
- Mar 12, 2026
- Vendor
- Shenzhen Tenda Technology Co., Ltd.
- Product
- W3
- Classifications
- CWE-119, CWE-121
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Mar 12, 2026CVE publishedPublication date reported by the CVE source.
- Mar 12, 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=1.0.0.3(2204)
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
- Tenda W3 formwrlSSIDget index buffer-overflow HTTP proof of conceptproof of concept · unverified
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Technologies
Your stack
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Your stack
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