The problem is that createDecipher() accepts a password, not a key. You need to use createDecipheriv() and pass any Buffer for the iv argument since it is ignored for ecb mode:
var DUMMY_IV = new Buffer(0),
aes_key = new Buffer('26333B482869778C14A2BEC1D4E2FD14', 'hex'),
aes = crypto.createDecipheriv('aes-128-ecb', aes_key, DUMMY_IV);
aes.setAutoPadding(false);
var data = Buffer.concat([
aes.update('5cc4711e67703657f0a04d887d7c074e', 'hex'),
aes.final()
]);
console.log(data.toString());
// outputs: testtesttesttest