The subpoena, a copy of which was made available to Reuters, demands that Blumenthal appear before the House committee on June 3 to give a deposition. The subpoena is dated Monday but carries a notation indicating an unnamed deputy U.S. marshal served it on Blumenthal's wife on Tuesday.
The copy of the subpoena contains no further details about the subject matter of the deposition.
"I can confirm Mr. Blumenthal has been called for a deposition by the committee," Jamal Ware, a spokesman for Republican Representative Trey Gowdy, the Benghazi committee chairman, said in response to a Reuters query.
More than two years ago, a set of emails sent by Blumenthal to Hillary Clinton while she served as secretary of state were posted on the Internet by a hacker who called himself Guccifer. Blumenthal did not work for Clinton when she was secretary of state and sent those emails as a private individual.