A 2019 report on Dominion Voting Systems' "Democracy Suite" by Texas SOS determined numerous vulnerabilities and issues in the software and hardware—such as convoluted setup, lost adjudication results, incorrect prompts, and power failures.

Certification was recommended denied.

After the examination ended in the recommendation of not certifying Dominion Voting's "Democracy Suite", further reports by Texas State Dept. questioned whether it was "suitable for its intended purpose" and if it "operated efficiently and accurately".

Certification was denied.

Texas officials reviewed Dominion's "Democracy Suite" on at least 6 separate occasions, all of them resulting in recommendations of not certifying it for use.

A compilation of these reports can be found here:
https://www.sos.texas.gov/elections/laws/oct2019-dominion.shtml

Further reports on Dominion Voting's machines confirmed that they could be "connected to the internet via ethernet ports", and "many of the security features are not automatic", relying on end users to complete set up.

According to multiple reports, an examiner was able to hook his phone to Dominion Voting machines via a USB port—and though the machine logged the event, it is "unclear" whether the system would've allowed the transfer of data.

It goes on to question the system's "reliability".

Dominion Voting's various systems and machines are used practically statewide, in California, Michigan, Alaska, Nevada, Georgia, New Mexico,and Colorado—also parts of Wisconsin, Arizona, Pennsylvania, Virginia and others.