CVE-2021-34470
Microsoft Exchange Server Elevation of Privilege Vulnerability
Vexday Risk Score
63High priority
SSVC decision (CISA)
Act
Exploitation + impact → act immediately
Exploit maturity
Proof of concept
Public proof of concept exists, but not yet automated.
CVSS 8EPSS 3.3%KEV nãoPoC públicaNuclei —Metasploit —Patch —
Lifecycle
14 Jul 2021Published on NVD
29 Jul 2021Public PoC
Weaponization speed
14 daysto first PoC
Recommendation: Patch as soon as possible — active exploitation confirmed.
Microsoft Exchange Server Elevation of Privilege Vulnerability
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Affected products
Microsoft · Microsoft Exchange Server 2013 Cumulative Update 23Microsoft · Microsoft Exchange Server 2016 Cumulative Update 21Microsoft · Microsoft Exchange Server 2019 Cumulative Update 10public PoCs found — 2
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