CVE-2021-26855 | Microsoft Exchange Server 2013 CU23/2016 CU18/2016 CU19/2019 CU7/2019 CU8 ProxyLogon server-side request forgery (EDB-49663)
A vulnerability, which was classified as very critical, has been found in Microsoft Exchange Server 2013 CU23/2016 CU18/2016 CU19/2019 CU7/2019 CU8. This vulnerability affects unknown code. The manipulation leads to server-side request forgery.
This vulnerability is documented as CVE-2021-26855. The attack can be initiated remotely. Additionally, an exploit exists.
It is recommended to apply a patch to fix this issue.