What is CVE-2025-71020?

CVE-2025-71020 is a high-severity vulnerability in Tenda Ax1806, classified under Stack-based Buffer Overflow. CVSS score: 7.5/10. Published 2026-01-16.

How severe is CVE-2025-71020?

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

Buffer overflow in Tenda Ax1806

CVE-2025-71020

Tenda AX-1806 v1.0.0.1 was discovered to contain a stack overflow in the security parameter of the sub_4C408 function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request.

Vulnerability class: Buffer Overflow

EPSS: 0.003 (22.8th 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 Ax1806
Tenda Ax1806_firmware — versions 1.0.0.1
N/a — versions n/a

Weakness classification (CWE)

CWE-121 — Stack-based Buffer Overflow

References

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

Frequently asked questions

What is CVE-2025-71020?: CVE-2025-71020 is a high-severity vulnerability in Tenda Ax1806, classified under Stack-based Buffer Overflow. CVSS score: 7.5/10. Published 2026-01-16.
How severe is CVE-2025-71020?: High severity. CVSS v3 base score is 7.5 out of 10.