CVE-2025-71024
Published: 13 January 2026
Summary
CVE-2025-71024 is a high-severity Out-of-bounds Write (CWE-787) vulnerability in Tenda Ax3 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 26.4th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-16 (Memory Protection).
Deeper analysis
CVE-2025-71024 is a stack-based buffer overflow vulnerability affecting the Tenda AX-3 router on firmware version v16.03.12.10_CN. The issue resides in the serviceName2 parameter handled by the fromAdvSetMacMtuWan function, which can be triggered by malformed input. Published on 2026-01-13, it 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) and is associated with CWE-787 (Out-of-bounds Write) and CWE-121 (Stack-based Buffer Overflow).
Remote attackers require only network access to the vulnerable device, with no authentication, privileges, or user interaction needed. By sending a specially crafted HTTP request targeting the affected function, an exploiter can trigger the stack overflow, resulting in a denial-of-service condition through device crash or reboot.
Details on the vulnerability, including reproduction steps, are available in the referenced GitHub repository at https://github.com/0-fool/VulnbyCola/blob/main/Tenda/AX-3/12/1.md. No vendor patches or official mitigation guidance are specified in the available information.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-2269
Vulnerability details
Tenda AX-3 v16.03.12.10_CN was discovered to contain a stack overflow in the serviceName2 parameter of the fromAdvSetMacMtuWan function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Stack buffer overflow in router web interface function enables remote unauthenticated exploitation of public-facing app (T1190) to trigger application/system DoS via crafted request (T1499.004).
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Requires validation of the serviceName2 parameter in HTTP requests to prevent malformed input from triggering the stack overflow.
Implements memory safeguards like stack canaries and address space randomization to protect against stack-based buffer overflows in the fromAdvSetMacMtuWan function.
Mandates identification, reporting, and correction of flaws such as this stack overflow vulnerability through timely patching or updates.