CVE-2023-51743 Buffer Overflow vulnerability in Skyworth Router

Medium 6.5 Published 17 Jan 2024 Updated 17 Jun 2025

A remote attacker can cause a Denial of Service on Skyworth Routers by sending crafted input to the UCID parameter.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2023-51743?

CVE-2023-51743 is a medium-severity memory corruption vulnerability in Hathway Skyworth Router CM5100, published on 17 Jan 2024. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

This vulnerability exist in Skyworth Router CM5100, version 4.1.1.24, due to insufficient validation of user supplied input for the Set Upstream Channel ID (UCID) parameter at its web interface. A remote attacker could exploit this vulnerability by supplying specially crafted input to the parameter at the web interface of the vulnerable targeted system.

Successful exploitation of this vulnerability could allow the attacker to perform a Denial of Service (DoS) attack on the targeted system.

Weakness: CWE-787

Which versions are affected by CVE-2023-51743?

It affects 1 product.

Products include Skyworthdigital Cm5100 Firmware.

How do I fix CVE-2023-51743?

No fix has been published for CVE-2023-51743 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-2023-51743 being exploited?

There is no known exploitation of CVE-2023-51743 in the wild and no public exploit code.

Sources

Also known as GHSA-6f66-xj9j-jjg9.