CVE-2021-26412

CVE-2021-26412

Critical · published March 3, 2021

CVSS v3.1
9.1
EPSS
34%
Percentile
98.4
In the wild
Unconfirmed
What it is

🚨 This is a remote code execution vulnerability lurking in Microsoft Exchange Server, and it’s a big deal - an attacker could unleash chaos with just a malicious command! 🔥 Think of it like a delivery person who can not only drop off packages but also has the ability to change the entire delivery contents without anyone noticing. The server blindly trusts anything that comes its way, allowing potential mayhem! An attacker exploiting this vulnerability could take complete control of your Exchange Server, leading to data breaches, unauthorized access to sensitive information, and potentially crippling your entire communication system. The consequences could be absolutely devastating—imagine losing critical emails or exposing confidential data!

Put simply

Think of it like a delivery person who can not only drop off packages but also has the ability to change the entire delivery contents without anyone noticing. The server blindly trusts anything that comes its way, allowing potential mayhem! This vulnerability allows remote attackers to execute arbitrary code on Microsoft Exchange Servers by sending specially crafted requests, bypassing normal security checks, and gaining control over the system.

What to do

An attacker exploiting this vulnerability could take complete control of your Exchange Server, leading to data breaches, unauthorized access to sensitive information, and potentially crippling your entire communication system. The consequences could be absolutely devastating—imagine losing critical emails or exposing confidential data! To protect your environment, make sure to apply the latest security patches from Microsoft immediately. Regularly review your Exchange Server's configurations and monitoring to detect any unusual activity. Don't take this lightly—get those updates sorted now! You've got this! Secure your Exchange Server and keep your data safe! 🛡️

The record
Technical detail
CVSS v3.1
9.1 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.33757 · 98.4th percentile
Published
2021-03-03T05:15Z
Affected products (5)
ProductVersionsFixed in
microsoft/exchange_serverall versions—
microsoft/exchange_serverall versions—
microsoft/exchange_serverall versions—
microsoft/exchange_serverall versions—
microsoft/exchange_serverall versions—
References (2)
EPSS history
Timeline
  • 02 MAR 23:55Z
    Microsoft Exchange Server Remote Code Execution Vulnerability
    cvelistv5