July 29 (Reuters) - One of the U.S. Department of

Energy's 17 national labs was attacked by hackers as part of a

recent campaign seeking to exploit flaws in Microsoft's ( MSFT )

SharePoint software, Bloomberg News reported on Tuesday, citing

a department spokesperson.

"Attackers did attempt to access Fermilab's SharePoint

servers," a Department of Energy spokesperson told Bloomberg,

referring to the U.S. Fermi National Accelerator Laboratory.

"The attackers were quickly identified, and the impact was

minimal, with no sensitive or classified data accessed," the

spokesperson said, adding that Fermilab's servers are back

online and running normally.

Microsoft ( MSFT ), Fermilab and the U.S. Department of Energy did

not immediately respond to Reuters' requests for comment.

A security patch released by Microsoft ( MSFT ) last month failed to

fully fix a critical flaw in the U.S. tech giant's SharePoint

server software that had been identified in May, opening the

door to a sweeping global cyber espionage operation.

Fermilab, established in 1967, is "America's particle

physics and accelerator laboratory," according to its website.

Last week, a U.S. Department of Energy spokesperson told

Reuters that on July 18 a SharePoint security flaw impacted its

systems, including those of the National Nuclear Security

Administration, which oversees the nation's nuclear weapons

stockpile.

The department had stated that all affected systems were

being restored.

(Reporting by Abu Sultan in Bengaluru; Editing by Sandra Maler

and Muralikumar Anantharaman)