What is CVE-2025-71027?

CVE-2025-71027 is a high-severity vulnerability in Tenda Ax3, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2026-01-13.

How severe is CVE-2025-71027?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in Tenda Ax3

CVE-2025-71027

Tenda AX-3 v16.03.12.10_CN was discovered to contain a stack overflow in the wanMTU2 parameter of the fromAdvSetMacMtuWan function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request.

Vulnerability class: Buffer Overflow

EPSS: 0.004 (30.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Tenda Ax3
Tenda Ax3_firmware — versions 16.03.12.10_cn
N/a — versions n/a

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write
CWE-121 — Stack-based Buffer Overflow

References

cve@mitre.org (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2025-71027?: CVE-2025-71027 is a high-severity vulnerability in Tenda Ax3, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2026-01-13.
How severe is CVE-2025-71027?: High severity. CVSS v3 base score is 7.5 out of 10.