CVE-2026-12562 Toptech Systems RCU II+ and Multiload II+ Missing Authentication for Critical Function
Unauthenticated TCF service allows attackers to gain root access, modify filesystems, and control processes on Toptech Systems devices.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-12562?
CVE-2026-12562 is a high-severity missing authorization vulnerability in Toptech Systems Multiload II+, published on 30 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The RCU II+ and Multiload II+ are vulnerable to an unauthenticated service that exposes a debug interface granting full root-level access to the embedded system. This vulnerability stems from a network-accessible port running a Target Communications Framework (TCF) service that does not require any authentication, allowing an attacker to directly interact with the Linux environment that powers the device. Once connected, an attacker can freely view and modify the filesystem, manipulate running processes, and control network interfaces, enabling deep alteration of system behavior.
Weakness: CWE-306
Which versions are affected by CVE-2026-12562?
How do I fix CVE-2026-12562?
No fix has been published for CVE-2026-12562 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-12562 being exploited?
There is no known exploitation of CVE-2026-12562 in the wild and no public exploit code.
Sources
Also known as GHSA-w374-9vqx-5hr2.