Senate Intel: Russian hackers were able to "at a minimum, alter or delete voter registration data"
Senate Intel: Russia waged unprecedented cyber campaign on U.S. voting systems
Most of the attempts amounted to hackers scanning a states secretary of State website or voter registration infrastructure for vulnerabilities, and did not amount to successful breaches. However, in at least six states, Russia-linked hackers conducted malicious access attempts on voting-related websites.
In a small number of states, Russian-affiliated cyber actors were able to gain access to restricted elements of election infrastructure, the report states. In a small number of states, these cyber actors were in a position to, at a minimum, alter or delete voter registration data; however, they did not appear to be in a position to manipulate individual votes or aggregate vote totals.
The committee also found, through its investigation, that Russia conducted intelligence gathering and other intelligence-related activities before the 2016 vote likely in preparation for discrediting the integrity of the U.S. voting process. The report provides few details on this activity, or an explanation of why the committee came to the conclusion about the motive behind it.
Because the committees findings are based on information from the states, the report emphasizes that it is possible more states were attacked but that the activity was not detected echoing a point made by a top Homeland Security official just last month.
http://thehill.com/policy/cybersecurity/386833-senate-intel-report-says-russia-waged-unprecedented-cyber-campaign