CVE-2025-70648
Published: 21 January 2026
Summary
CVE-2025-70648 is a high-severity Stack-based Buffer Overflow (CWE-121) vulnerability in Tenda Ax1803 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 buffer overflow in public-facing router firmware directly enables T1190 (exploit of exposed web/config interface) and T1499.004 (DoS via crafted input triggering crash).
NVD Description
Tenda AX1803 v1.0.0.1 was discovered to contain a stack overflow in the security_5g parameter of the sub_727F4 function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request.
Deeper analysisAI
CVE-2025-70648 is a stack overflow vulnerability in the Tenda AX1803 router running firmware version v1.0.0.1. The issue resides in the security_5g parameter handled by the sub_727F4 function, which can be triggered by a specially crafted request. It is classified under CWE-121 (Stack-based Buffer Overflow) and carries a CVSS v3.1 base score of 7.5, reflecting high severity due to its potential for disruption.
Remote attackers can exploit this vulnerability over the network without authentication or user interaction, as indicated by the CVSS vector AV:N/AC:L/PR:N/UI:N. Successful exploitation leads to a Denial of Service (DoS) condition by crashing the device, rendering it unavailable (A:H) with no impact on confidentiality or integrity (C:N/I:N).
Mitigation details are available in the referenced advisory at https://github.com/0-fool/VulnbyCola/blob/main/Tenda/AX-1803/6/1.md, published alongside the CVE disclosure on 2026-01-21.
Details
- CWE(s)