CVE-2022-21846

Microsoft Exchange Server Remote Code Execution Vulnerability

Critical · published January 11, 2022

CVSS v3.1
9.0
EPSS
1%
Percentile
64.3
In the wild
Unconfirmed
What it is

🚨 A single malformed HTTP request could let an attacker execute code on your Exchange Server! 🔥 Think of it like a UPS delivery person being handed a package without checking the address — they just drop it off, no questions asked. That’s what happens here when the server doesn’t verify incoming requests properly! If exploited, an attacker could gain complete control over the Exchange server, steal sensitive data, or disrupt business operations entirely. This could lead to a catastrophic breach, putting your organization’s reputation and finances on the line. Don't let this vulnerability become your worst nightmare!

Put simply

Think of it like a UPS delivery person being handed a package without checking the address — they just drop it off, no questions asked. That’s what happens here when the server doesn’t verify incoming requests properly! This vulnerability arises from improper validation of HTTP requests in Microsoft Exchange Server, allowing attackers to execute arbitrary code remotely without authentication. It's a golden opportunity for malicious actors if left unpatched!

What to do

If exploited, an attacker could gain complete control over the Exchange server, steal sensitive data, or disrupt business operations entirely. This could lead to a catastrophic breach, putting your organization’s reputation and finances on the line. Don't let this vulnerability become your worst nightmare! Immediately apply the security update provided by Microsoft to remediate this vulnerability. Ensure you are running the latest version of Exchange Server and conduct a thorough review of your network security protocols to prevent unauthorized access. 🔒 You've got this! By taking action now, you can protect your Exchange server and keep the bad guys at bay! 🛡️

The record
Technical detail
CVSS v3.1
9.0 · CRITICAL
Vector
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C
CVSS v4.0
Not supplied
EPSS
0.01060 · 64.3th percentile
Published
2022-01-11T20:22Z
EPSS history
Timeline
  • 11 JAN 20:22Z
    Microsoft Exchange Server Remote Code Execution Vulnerability
    cvelistv5