More than half of the U.S. diplomatic posts overseas may not fully meet security standards, according to Undersecretary of State Pat Kennedy.

Patrick told a House appropriations subcommittee that of the 283 diplomatic posts around the world, more than 150 of them have not been updated to meet current security standards.

"There remain approximately 158 posts that have facilities that may not fully meet current security standards," he said.

"Many of these facilities were built or acquired prior to the establishment of the current security standards, and others are subject to authorized waivers and/or exceptions," Kennedy said.

The issue of embassy security has been under scrutiny since last year's deadly attack on the U.S. Consulate in Benghazi, Libya.

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