The Russian government is set to publicly release emails obtained from Hillary Clinton's private server, according to a new report.

Clinton has maintained the highly classified information that passed through her controversial system was not intercepted by foreign governments.

However, according to trade site OilPrice.com citing US intelligence sources, the government is braced for a release that would suggest the opposite.

And it could come at any time once the Kremlin gives the green light, the site reports.

'Breach': A report claims Hillary Clinton's private email server was accessed by the Russians, who are set to release the confidential information soon

Clinton would be at risk of violating the Espionage Act if foreign governments or sources accessed classified information through her personal server.

It is not the first mention that Russia could have obtained some of the emails.

Last year it emerged that Clinton's private server was directly connected to the internet in ways that made it more vulnerable to hackers.

A recent State Department inspector general's report indicated the server was temporarily unplugged by a Clinton aide at one point during attacks by hackers, but her campaign has said there's no evidence the server was hacked.

In each year from 2011 to 2014, the State Department's poor cybersecurity was identified by its inspector general as a 'significant deficiency' that put the department's information at risk.

Another State Department inspector general report revealed that hacking attempts forced Clinton off her private email at one point in 2011.

Then in 2014, the State Department's unclassified email system was breached by hackers with links to Russia. They stole an unspecified number of emails.

The hack was so deep that State's email system had to be cut off from the internet while experts worked to eliminate the infestation.

At least 47 of the emails Clinton turned over to the State Department contain the notation 'B3 CIA PERS/ORG,' which indicates the material referred to CIA personnel or matters related to the agency.

And because both Clinton's server and the State Department systems were vulnerable to hacking, the perpetrators could have those original emails.

Stewart Baker, a Washington lawyer who spent more than three years as an assistant secretary of the Homeland Security Department and is former legal counsel for the National Security Agency, said it is 'entirely plausible ... that foreign intelligence services discovered and rifled Hillary Clinton's server'.

If so, infiltrators would have copies of all her emails - unredacted.

Baker points out another instance where Clinton's server might have been hacked.

A March 2, 2009, email warned against State Department officials using Blackberries. Eric Boswell, assistant secretary of state, says the 'vulnerabilities and risks associated with the use of Blackberries ... considerably outweigh their convenience.'

Nine days later, another email states that Clinton approached Boswell and says she 'gets' the risk.

The email also said: 'Her attention was drawn to the sentence that indicates we (the diplomatic security office officials) have intelligence concerning this vulnerability during her recent trip to Asia.'

Clinton traveled to China, Indonesia, Japan and South Korea in February 2009.