CVE-2025-63462 Memory corruption in n/a

High 7.5 Published 31 Oct 2025 Updated 3 Nov 2025

Attackers can cause a denial of service on Totolink A7000R routers via a stack overflow in the wifiOff parameter.

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-2025-63462?

CVE-2025-63462 is a high-severity memory corruption vulnerability in n/a, published on 31 Oct 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Totolink A7000R v9.1.0u.6115_B20201022 was discovered to contain a stack overflow via the wifiOff parameter in the sub_421A04 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-2025-63462?

It affects 1 product.

Products include Totolink A7000r Firmware.

How do I fix CVE-2025-63462?

No fix has been published for CVE-2025-63462 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-2025-63462 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-63462 exists.

Sources

Also known as GHSA-rw7q-hr3r-j4gq.