CVE-2025-71020 Memory corruption in n/a
Attackers can cause a Denial of Service on Tenda AX-1806 routers via a crafted request triggering a stack overflow.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-71020?
CVE-2025-71020 is a high-severity memory corruption vulnerability in Tenda Ax1806 Firmware, published on 16 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-121
Which versions are affected by CVE-2025-71020?
It affects 1 product.
Products include Tenda Ax1806 Firmware.
How do I fix CVE-2025-71020?
No fix has been published for CVE-2025-71020 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-71020 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-71020 exists.
Other vulnerabilities in Tenda Ax1806 Firmware
Sources
Also known as GHSA-w9wr-47qf-x6gr.