Title: Microsoft Office Encrypted Document RC4 Implementation Weakness
Jan 11, 2005
Office contains a flaw that may lead to an unauthorized information disclosure. The issue is triggered when the initialization vector is re-used when encrypting Word and Excel files, which will cause the resulting keystreams to be vulnerable to cryptanalysis resulting in a loss of confidentiality.
Loss of Confidentiality
Currently, there are no known upgrades, patches, or workarounds available to correct this issue.