Adobe Acrobat 9 uses more efficient encryption than previous versions, which makes it easier for attackers to guess a documents password via a brute-force attack.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Acrobat | Adobe | 9 (including) | 9 (including) |
| Acrobat | Adobe | 9.0 (including) | 9.0 (including) |