В Microsoft Exchange нашли 0-day уязвимость PrivExchange

https://xakep.ru/2019/01/29/privexchange/

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Abusing Exchange: One API call away from Domain Admin

https://dirkjanm.io/abusing-exchange-one-api-call-away-from-domain-admin/

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Exchange your privileges for Domain Admin privs by abusing Exchange

https://github.com/dirkjanm/privexchange/