The Internal Revenue Service is being urged to fix a security vulnerability that makes it all too easy to get an Electronic Filing PIN used by tax preparers.

The IRS said earlier this month that it had identified and stopped an automated attack on its online Electronic Filing PIN application (see IRS Detects Attack on Electronic Filing PIN App). Based on its review, the IRS identified unauthorized attempts involving approximately 464,000 unique SSNs, of which 101,000 SSNs were used to successfully access an E-file PIN. The incident, involving an automated bot, occurred last month, and the IRS said it continues to closely monitor the web application.

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