CVE-2025-70747
Published: 14 January 2026
Summary
CVE-2025-70747 is a high-severity Stack-based Buffer Overflow (CWE-121) vulnerability in Tenda Ax1806 Firmware. Its CVSS base score is 7.5 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 22.4th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Threat & Defense at a Glance
Threat & Defense Details
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Remote unauthenticated stack overflow via crafted request to public service enables T1190 (Exploit Public-Facing Application) and directly produces DoS via T1499.004 (Application or System Exploitation).
NVD Description
Tenda AX-1806 v1.0.0.1 was discovered to contain a stack overflow in the serviceName parameter of the sub_65A28 function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request.
Deeper analysisAI
CVE-2025-70747 is a stack overflow vulnerability in the Tenda AX-1806 router running firmware version v1.0.0.1. The issue resides in the serviceName parameter handled by the sub_65A28 function, which can be triggered by a specially crafted request. This flaw, classified under CWE-121, was publicly disclosed on January 14, 2026, and carries a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H), indicating high severity primarily due to its potential for availability disruption.
Remote attackers require no authentication, privileges, or user interaction to exploit this vulnerability over the network with low complexity. By sending a malicious request targeting the vulnerable parameter, adversaries can trigger a stack overflow, leading to a Denial of Service (DoS) condition that crashes the device and renders it unresponsive until rebooted.
Further technical details and a proof-of-concept are documented in the advisory at https://github.com/0-fool/VulnbyCola/blob/main/Tenda/AX-1806/6/1.md. No official patches or vendor mitigations are specified in the available information.
Details
- CWE(s)