CVE-2025-14993
Unknown Unknown - Not Provided
Remote Stack-Based Buffer Overflow in Tenda AC18 HTTP Handler

Publication date: 2025-12-21

Last updated on: 2025-12-21

Assigner: VulDB

Description
A vulnerability was detected in Tenda AC18 15.03.05.05. This affects the function sprintf of the file /goform/SetDlnaCfg of the component HTTP Request Handler. The manipulation of the argument scanList results in stack-based buffer overflow. The attack can be executed remotely. The exploit is now public and may be used.
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Meta Information
Published
2025-12-21
Last Modified
2025-12-21
Generated
2026-06-16
AI Q&A
2025-12-21
EPSS Evaluated
2026-06-15
NVD
CVE-2025-14993
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
tenda ac18 15.03.05.05
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-119 The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
CWE-121 A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
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Executive Summary

CVE-2025-14993 is a stack-based buffer overflow vulnerability in the Tenda AC18 router firmware version 15.03.05.05. It occurs in the HTTP Request Handler component, specifically in the sprintf function of the /goform/SetDlnaCfg endpoint. When the 'scanList' parameter is manipulated with excessively large or crafted input, it causes a buffer overflow on the stack. This overflow can be exploited remotely by attackers to execute arbitrary code or cause a denial of service (DoS) condition. [1, 2]

Impact Analysis

This vulnerability can allow remote attackers to execute arbitrary code on the affected Tenda AC18 router or cause a denial of service (DoS), potentially compromising the device's confidentiality, integrity, and availability. Since exploitation requires no local access or physical interaction and is considered easy with public proof-of-concept exploits available, it poses a significant security risk to users of the affected device. [1, 2]

Detection Guidance

This vulnerability can be detected by monitoring HTTP requests sent to the endpoint /goform/SetDlnaCfg on Tenda AC18 routers running firmware version 15.03.05.05. Specifically, detection involves identifying requests where the "scanList" parameter contains excessively large or malformed data that could trigger the stack-based buffer overflow. Network intrusion detection systems (NIDS) or web application firewalls (WAF) can be configured to alert on unusually large or suspicious payloads targeting this endpoint. Additionally, manual inspection or scripting can be used to send crafted HTTP requests to test for the vulnerability. However, no specific detection commands are provided in the resources. [1, 2]

Mitigation Strategies

Immediate mitigation steps include replacing the affected Tenda AC18 router running firmware version 15.03.05.05 with an alternative device, as no known countermeasures or patches currently exist. Limiting or blocking remote access to the /goform/SetDlnaCfg endpoint via firewall rules or network segmentation may reduce exposure. Monitoring for exploit attempts and disabling unnecessary services on the device can also help. Since the exploit is publicly available and easy to execute remotely, urgent replacement or isolation of the vulnerable device is recommended. [2]

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