CVE-2025-28021 Memory corruption in n/a

High 7.3 Published 23 Apr 2025 Updated 24 Apr 2025

A buffer overflow in the downloadFile.cgi script allows attackers to execute arbitrary code or cause a denial of service on TOTOLINK A810R routers.

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-2025-28021?

CVE-2025-28021 is a high-severity memory corruption vulnerability in n/a, published on 23 Apr 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

TOTOLINK A810R V4.1.2cu.5182_B20201026 was found to contain a buffer overflow vulnerability in the downloadFile.cgi through the v14 and v3 parameters

Weakness: CWE-120

Which versions are affected by CVE-2025-28021?

It affects 1 product.

Products include Totolink A810r Firmware.

How do I fix CVE-2025-28021?

No fix has been published for CVE-2025-28021 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-2025-28021 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-28021 exists.

Sources

Also known as GHSA-m4gg-j947-295m.