CVE-2022-41040KEV · OVERDUE

Microsoft Exchange Server Elevation of Privilege Vulnerability

High · published October 3, 2022

Patch now

Confirmed exploited, and the score agrees

CVSS calls it high at 8.8. It is confirmed in active exploitation. It sits in the 100.0th percentile for exploit probability.

1464
days past CISA
deadline
CVSS v3.1
8.8
EPSS
100%
Percentile
100.0
In the wild
Confirmed
What it is

🚨 Microsoft Exchange Server has a serious flaw that allows attackers to elevate their privileges with just a few clever moves! 🔥 Think of it as an employee gaining access to the executive lounge without the proper clearance — suddenly, they can access sensitive documents and make powerful decisions without oversight! This vulnerability could allow an attacker to gain administrative access, enabling them to control all aspects of the server, steal sensitive data, or even disrupt operations. The consequences could be absolutely devastating for any organization relying on Exchange Server for communication.

Put simply

Think of it as an employee gaining access to the executive lounge without the proper clearance — suddenly, they can access sensitive documents and make powerful decisions without oversight! The CVE-2022-41040 vulnerability is tied to improper privilege management within Microsoft Exchange Server, allowing attackers to exploit it to elevate their access rights and perform unauthorized actions.

What to do

This vulnerability could allow an attacker to gain administrative access, enabling them to control all aspects of the server, steal sensitive data, or even disrupt operations. The consequences could be absolutely devastating for any organization relying on Exchange Server for communication. To safeguard your systems, immediately apply the patches provided by Microsoft for affected versions of Exchange Server. Regularly review access controls and audit permissions to ensure no unauthorized access is granted. You’ve got this! By taking these steps, you’ll bolster your defenses and keep your Exchange Server secure! 🛡️

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
CVSS v4.0
Not supplied
EPSS
0.99956 · 100.0th percentile
Published
2022-10-03T00:00Z
KEV added
2022-09-30 · due 2022-10-21
EPSS history
Timeline
  • 03 OCT 00:00Z
    Microsoft Exchange Server Elevation of Privilege Vulnerability
    cvelistv5
  • 30 SEP 00:00Z
    Added to CISA KEV — remediate by Oct 21
    kev