The Office of Personnel Management (OPM) said Wednesday that it underestimated by approximately 4 million the number of individuals whose fingerprints were stolen in the massive breach revealed this spring.

OPM revised its original estimate of 1.1 million to 5.6 million after it discovered archived records not previously analyzed.

The agency says that the new estimate does not impact the overall number of individuals whose data was exposed by the hack. The total still stands at as many as 22.1 million former, current and prospective federal employees, contractors and others.

Citing federal experts, OPM assured breach victims that “as of now, the ability to misuse fingerprint data is limited,” but that “this probability could change over time as technology evolves.”

An interagency working group including members from the FBI, the Department of Homeland Security, the Department of Defense (DOD) and other intelligence community members are studying how cyber criminals could potentially exploit the data.

“If, in the future, new means are developed to misuse the fingerprint data, the government will provide additional information to individuals whose fingerprints may have been stolen in this breach,” a spokesman said in a release.

Read the article “OPM Underestimated Number of Fingerprints Stolen in Hack by Millions” on thehill.com.