Authenticated router crash via unchecked strcpy
Published Oct 5, 2025 · Updated Oct 5, 2025
Buffer overflow in UTT HiPER 840G 3.1.1-190328 and earlier allows remote authenticated users to crash the router via a crafted task request. In /goform/formTaskEdit, the non-01 selDateType branch copies attacker-controlled txtMin2 data into a fixed buffer with strcpy and no length check. Valid web-management credentials are required; the published proof of concept demonstrates service interruption rather than code execution.
Summary
What happened
Buffer overflow in UTT HiPER 840G 3.1.1-190328 and earlier allows remote authenticated users to crash the router via a crafted task request. In /goform/formTaskEdit, the non-01 selDateType branch copies attacker-controlled txtMin2 data into a fixed buffer with strcpy and no length check. Valid web-management credentials are required; the published proof of concept demonstrates service interruption rather than code execution.
The record
- CVE
- CVE-2025-11305
- Published
- Oct 5, 2025
- Updated
- Oct 5, 2025
- Vendor
- Shanghai Aitai Technology Co., Ltd.
- Product
- HiPER 840G
- Classifications
- CWE-119, CWE-120, T1499.004
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Oct 5, 2025CVE publishedPublication date reported by the CVE source.
- Oct 5, 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=3.1.1-190328
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
- HiPER 840G formTaskEdit denial-of-service proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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