Microsoft Exchange Server Spoofing Vulnerability
CVE-2021-41349

6.5MEDIUM

Key Information:

Vendor
Microsoft
Status
Microsoft Exchange Server 2013 Cumulative Update 23
Microsoft Exchange Server 2016 Cumulative Update 21
Microsoft Exchange Server 2019 Cumulative Update 10
Microsoft Exchange Server 2016 Cumulative Update 22
Vendor
CVE Published:
10 November 2021

Badges

👾 Exploit Exists🟡 Public PoC🟣 EPSS 95%

Summary

Microsoft Exchange Server Spoofing Vulnerability

Affected Version(s)

Microsoft Exchange Server 2013 Cumulative Update 23 x64-based Systems 15.00.0 < 15.00.1497.026

Microsoft Exchange Server 2016 Cumulative Update 21 x64-based Systems 15.01.0 < 15.01.2308.020

Microsoft Exchange Server 2016 Cumulative Update 22 x64-based Systems 15.0.0 < 15.01.2375.017

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-2021-41349
Created by exploit-io

CVE-2021-41349
Created by 0xrobiul

References

https://portal.msrc.microsoft.com/en-US/security-guidance...
x_refsource_MISC

EPSS Score

95% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Collectors

NVD DatabaseMitre Database2 Proof of Concept(s)
.