A constant symbolic reference to an object is used, even though the reference can resolve to a different object over time.
The attacker can gain access to otherwise unauthorized resources.
Race conditions such as this kind may be employed to gain read or write access to resources not normally readable or writable by the user in question.
The resource in question, or other resources (through the corrupted one) may be changed in undesirable ways by a malicious user.
If a file or other resource is written in this method, as opposed to a valid way, logging of the activity may not occur.
In some cases it may be possible to delete files that a malicious user might not otherwise have access to -- such as log files.