Authenticated memory corruption via unbounded host IP values
Published Apr 19, 2025 · Updated Apr 21, 2025
Stack-based buffer overflow in Tenda W12 and i24 3.0.0.4(2887) and 3.0.0.5(3644) allows remote authenticated users to corrupt memory. The cgiSysUplinkCheckSet handler in /bin/httpd fails to bound hostIp1 and hostIp2 values before storing them in a stack buffer. Low-privilege access to the web management path is required; the record identifies memory corruption but does not publish a specific post-overflow outcome.
Summary
What happened
Stack-based buffer overflow in Tenda W12 and i24 3.0.0.4(2887) and 3.0.0.5(3644) allows remote authenticated users to corrupt memory. The cgiSysUplinkCheckSet handler in /bin/httpd fails to bound hostIp1 and hostIp2 values before storing them in a stack buffer. Low-privilege access to the web management path is required; the record identifies memory corruption but does not publish a specific post-overflow outcome.
The record
- CVE
- CVE-2025-3820
- Published
- Apr 19, 2025
- Updated
- Apr 21, 2025
- Vendor
- Shenzhen Tenda Technology Co., Ltd.
- Product
- i24
- Classifications
- CWE-119, CWE-121, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Apr 19, 2025CVE publishedPublication date reported by the CVE source.
- Apr 21, 2025Record 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=3.0.0.4(2887)
- Affected versionversion=3.0.0.5(3644)
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
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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