CVE-1999-0993

Summary

CVE-1999-0993 is a vulnerability affecting Microsoft Exchange Server 5.5. Hackers can exploit this issue by modifying Access Control Lists (ACLs) without proper authorization, but the changes will not take effect until the directory store cache is refreshed. This creates a window of opportunity for unauthorized access or data manipulation. System administrators must refresh the cache manually to apply the new ACLs and mitigate this risk. Failure to do so could result in serious security consequences.

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