By default, Microsoft SQL Server installs with a default password. The 'sa' account has a null password which is publicly known and documented. This allows remote attackers to trivially access the program or system.
Currently, there are no known upgrades or patches to correct this issue. It is possible to correct the flaw by implementing the following workaround: secure the 'sa' account with a password.
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This section lists the latest news and blogs found via the daylife API (and for older items, the technorati API), which mention or otherwise discuss this vulnerability.