Microsoft Exchange Server Elevation of Privilege Vulnerability
CVE-2021-34470

8HIGH

Key Information:

Vendor
Microsoft
Status
Microsoft Exchange Server 2013 Cumulative Update 23
Microsoft Exchange Server 2019 Cumulative Update 10
Microsoft Exchange Server 2016 Cumulative Update 21
Vendor
CVE Published:
14 July 2021

Badges

👾 Exploit Exists🟡 Public PoC

Summary

Microsoft Exchange Server Elevation of Privilege Vulnerability

Affected Version(s)

Microsoft Exchange Server 2013 Cumulative Update 23 x64-based Systems 15.00.0 < 15.00.1497.023

Microsoft Exchange Server 2016 Cumulative Update 21 x64-based Systems 15.01.0 < 15.01.2308.008

Microsoft Exchange Server 2019 Cumulative Update 10 x64-based Systems 15.02.0 < 15.02.0922.007

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2021-34470scanner
Created by technion

References

https://portal.msrc.microsoft.com/en-US/security-guidance...
x_refsource_MISC
http://packetstormsecurity.com/files/163706/Microsoft-Exc...
x_refsource_MISC

EPSS Score

0% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Collectors

NVD DatabaseMitre Database1 Proof of Concept(s)
.