While VK makes these files accessible, remember that CLE International still publishes these books. The corrigés are meant to be purchased (often as an insert or a separate thin booklet). Using a shared PDF is technically copyright infringement, though many self-learners justify it as "fair use for personal study." If you can, support the authors by buying the official Corrigés (ISBN: 978-2090381223) – it's under €10.
They offer a legitimate e-book version that includes interactive exercises. While VK makes these files accessible, remember that
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If you're moving between levels, you can find the corresponding for those as well: Débutant (A1) : Often bundled with the 400 exercises edition. Avancé (B1/B2) While VK makes these files accessible