CVE-2025-28027 Memory corruption in n/a

High 7.3 Published 22 Apr 2025 Updated 23 Apr 2025

A buffer overflow in the downloadFile.cgi script allows attackers to execute arbitrary code on affected TOTOLINK 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-2025-28027?

CVE-2025-28027 is a high-severity memory corruption vulnerability in n/a, published on 22 Apr 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

TOTOLINK A830R V4.1.2cu.5182_B20201102, A950RG V4.1.2cu.5161_B20200903, A3000RU V5.9c.5185_B20201128, and A3100R V4.1.2cu.5247_B20211129 was found to contain a buffer overflow vulnerability in downloadFile.cgi.

Weakness: CWE-121

Which versions are affected by CVE-2025-28027?

It affects 4 products.

Products include Totolink A3000ru Firmware, Totolink A3100r Firmware, Totolink A830r Firmware, Totolink A950rg Firmware.

How do I fix CVE-2025-28027?

No fix has been published for CVE-2025-28027 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-2025-28027 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-28027 exists.

Sources

Also known as GHSA-2m4j-5h27-9q77.