<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM TUT SYSTEMS,
INC. AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO CUSH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
<S> <C> <C>
<PERIOD-TYPE> 12-MOS 6-MOS
<FISCAL-YEAR-END> DEC-31-1999 DEC-31-2000
<PERIOD-START> JAN-01-1999 JAN-01-2000
<PERIOD-END> DEC-31-1999 JUN-30-2000
<CASH> 13,405 26,934
<SECURITIES> 18,831 107,717
<RECEIVABLES> 12,077 15,924
<ALLOWANCES> (335) (537)
<INVENTORY> 8,401 15,353
<CURRENT-ASSETS> 56,125 170,639
<PP&E> 5,556 10,461
<DEPRECIATION> 2,080 2,857
<TOTAL-ASSETS> 65,356 245,863
<CURRENT-LIABILITIES> 11,709 13,973
<BONDS> 0 0
0 0
0 0
<COMMON> 12 15
<OTHER-SE> 51,510 229,443
<TOTAL-LIABILITY-AND-EQUITY> 65,356 245,863
<SALES> 26,266 36,509
<TOTAL-REVENUES> 27,807 37,488
<CGS> 15,459 20,371
<TOTAL-COSTS> 25,677 25,139
<OTHER-EXPENSES> 2,204 3,056
<LOSS-PROVISION> 0 0
<INTEREST-EXPENSE> 608 449
<INCOME-PRETAX> (11,733) (5,415)
<INCOME-TAX> 1 1
<INCOME-CONTINUING> (11,734) (5,416)
<DISCONTINUED> 0 0
<EXTRAORDINARY> 0 0
<CHANGES> 0 0
<NET-INCOME> (11,734) (5,416)
<EPS-BASIC> (1.12) (0.39)
<EPS-DILUTED> (1.12) (0.39)
</TABLE>