CVE-2021-42321 - Exchange RCE

https://gist.github.com/testanull/0188c1ae847f37a70fe536123d14f398

https://twitter.com/testanull/status/1462363736815988744

https://peterjson.medium.com/some-notes-about-microsoft-exchange-deserialization-rce-cve-2021-42321-110d04e8852

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