This week a security researcher published on GitHub a proof-of-concept tool to hack Microsoft Exchange servers chaining two of ProxyLogon flaws.  On March 2nd, Microsoft has released emergency out-of-band security updates that address four zero-day issues (CVE-2021-26855, CVE-2021-26857, CVE-2021-26858, and CVE-2021-27065) in all supported Microsoft Exchange versions that are actively exploited in the wild. The IT giant … Continue reading Expert publishes PoC exploit code for Microsoft Exchange flaws