Erro estranho ao conectar em session factory

hibernate.cfg.xml

Obs: Todos os dados estão corretos

<?xml version="1.0" encoding="UTF-8"?>   
<!DOCTYPE hibernate-configuration PUBLIC   
        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"   
        "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">   
<hibernate-configuration>   

     <session-factory>   
     
         <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>   
         <property name="hibernate.connection.url">endereco</property>   
         <property name="hibernate.connection.username">usuario</property>   
         <property name="hibernate.connection.password">senha</property>   
         <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
         <property name="hibernate.show_sql">false</property>
         <property name="hibernate.format_sql">true</property>
         <property name="hibernate.hbm2ddl.auto">update</property>
    
     </session-factory>   
</hibernate-configuration>

Tenho um hibernateUtil que cria a session factory. Resumidamente:

...
AnnotationConfiguration cfg = new AnnotationConfiguration();
cfg.configure("/hibernate.cfg.xml");
sessionFactory = cfg.buildSessionFactory();

...

e retorna a session factory

Se no hibernate.cfg.xml tem configurado um banco local funciona corretamente, porém se configuro um banco que está em um servidor a session factory é criada porém ao persistir:

Caused by: org.hibernate.exception.SQLGrammarException: Cannot open connection at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:90) at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66) at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:52) at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:449) at org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:167) at org.hibernate.jdbc.AbstractBatcher.prepareQueryStatement(AbstractBatcher.java:161) at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1573) at org.hibernate.loader.Loader.doQuery(Loader.java:696) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:259) at org.hibernate.loader.Loader.doList(Loader.java:2228) at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2125) at org.hibernate.loader.Loader.list(Loader.java:2120) at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:401) at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:361) at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:196) at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1148) at org.hibernate.impl.QueryImpl.list(QueryImpl.java:102) at org.hibernate.impl.AbstractQueryImpl.uniqueResult(AbstractQueryImpl.java:835) at br.com.cauirs.sgv.model.dao.EmpresaHibernateDao.getEmpresa(EmpresaHibernateDao.java:21) ... 28 more Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Acesso negado para o usuário 'xxx'@'%' ao banco de dados 'xxx' at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) at java.lang.reflect.Constructor.newInstance(Unknown Source) at com.mysql.jdbc.Util.handleNewInstance(Util.java:406) at com.mysql.jdbc.Util.getInstance(Util.java:381) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1030) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3491) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3423) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:910) at com.mysql.jdbc.MysqlIO.secureAuth411(MysqlIO.java:3938) at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1273) at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2031) at com.mysql.jdbc.ConnectionImpl.(ConnectionImpl.java:718) at com.mysql.jdbc.JDBC4Connection.(JDBC4Connection.java:46) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) at java.lang.reflect.Constructor.newInstance(Unknown Source) at com.mysql.jdbc.Util.handleNewInstance(Util.java:406) at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:302) at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:282) at java.sql.DriverManager.getConnection(Unknown Source) at java.sql.DriverManager.getConnection(Unknown Source) at org.hibernate.connection.DriverManagerConnectionProvider.getConnection(DriverManagerConnectionProvider.java:133) at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:446) ... 43 more

Esse conhecia quando o usuário estivesse incorreto, porém os dados estão corretos e já testei 3 banco de dados diferentes.

Esse sistema Java está no servidor.E conecto nesse sistema por uma aplicação desktop isso pode gerar esse acesso negado?

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