{keyword}' Union: All Select Null,null,null,null,null,null,null,null,null,null From Msysaccessobjects-- Yena

The UNION ALL SELECT command attempts to append results from system tables (like MSysAccessObjects ) to the legitimate query results.

, you should always use parameterized queries (prepared statements) rather than concatenating user input directly into your SQL strings. The UNION ALL SELECT command attempts to append

Using NULL placeholders helps the attacker find the exact number of columns required for the injection to work. The UNION ALL SELECT command attempts to append

If you are looking for information on how this specific type of "Union-based" injection works or how to protect your database from it, I can certainly help with that. Generally, these strings are used to: The UNION ALL SELECT command attempts to append

Determine if a search field or login box is improperly sanitizing input.