CVE-2020-8973 ZGR TPS200 NG Improper access control

Critical 9.3 Published 17 Oct 2022 Updated 13 May 2025

An attacker on the local network can modify device parameters without authentication due to improper access control in the ZGR TPS200 NG.

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-2020-8973?

CVE-2020-8973 is a critical missing authorization vulnerability in ZGR TPS200 NG, published on 17 Oct 2022. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

ZGR TPS200 NG in its 2.00 firmware version and 1.01 hardware version, does not properly accept specially constructed requests. This allows an attacker with access to the network where the affected asset is located, to operate and change several parameters without having to be registered as a user on the web that owns the device.

Weakness: CWE-284

Which versions are affected by CVE-2020-8973?

It affects 1 product.

Products include Zigor Zgr Tps200 Ng Firmware.

How do I fix CVE-2020-8973?

No fix has been published for CVE-2020-8973 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-2020-8973 being exploited?

There is no known exploitation of CVE-2020-8973 in the wild and no public exploit code.

Sources

Also known as GHSA-8hw4-gj79-m365.