Authenticated code execution via unchecked delno copy
Published Jul 18, 2025 · Updated Jul 22, 2025
Stack-based buffer overflow in Tenda FH451 1.0.0.9 allows remote authenticated users to execute code or crash the router. The fromPptpUserSetting function passes the user-controlled delno value to memcpy without checking its length, overflowing the stack buffer dest. Low-privilege access to the network management interface is required, and exploitation can interrupt routing service or run code in the firmware process.
Summary
What happened
Stack-based buffer overflow in Tenda FH451 1.0.0.9 allows remote authenticated users to execute code or crash the router. The fromPptpUserSetting function passes the user-controlled delno value to memcpy without checking its length, overflowing the stack buffer dest. Low-privilege access to the network management interface is required, and exploitation can interrupt routing service or run code in the firmware process.
The record
- CVE
- CVE-2025-7805
- Published
- Jul 18, 2025
- Updated
- Jul 22, 2025
- Vendor
- Shenzhen Tenda Technology Co., Ltd.
- Product
- FH451
- Classifications
- CWE-119, CWE-121, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 18, 2025CVE publishedPublication date reported by the CVE source.
- Jul 22, 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=1.0.0.9
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
- Tenda FH451 fromPptpUserSetting proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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