CVE-2021-26897

CVE-2021-26897

Critical ยท published March 11, 2021

CVSS v3.1
9.8
EPSS
12%
Percentile
96.1
In the wild
Unconfirmed
What it is

๐Ÿšจ A sneaky flaw in Windows DNS Server could let attackers run their code remotely with just one crafted request!๐Ÿ”ฅ Think of your DNS server as a postal service that misdelivers packages. If an attacker knows how to slip in a fake address, they could redirect sensitive information or even send harmful packages right to your door! An attacker could gain complete control over the server, potentially leading to unauthorized access, data theft, or even a complete takeover of your network. This isn't just a quick prank; it's like handing over the keys to your entire digital castle!

Put simply

Think of your DNS server as a postal service that misdelivers packages. If an attacker knows how to slip in a fake address, they could redirect sensitive information or even send harmful packages right to your door! This vulnerability allows remote code execution due to improper handling of requests by the Windows DNS Server, meaning it can process malicious data without proper validation.

What to do

An attacker could gain complete control over the server, potentially leading to unauthorized access, data theft, or even a complete takeover of your network. This isn't just a quick prank; it's like handing over the keys to your entire digital castle! Patch your Windows DNS Server immediately to the latest version to close this critical vulnerability. Regularly review your DNS configurations and consider implementing additional security measures, such as monitoring for unusual requests. ๐Ÿ”’ You've got this! Follow these steps to secure your network and keep those bad actors at bay! ๐Ÿ›ก๏ธ

The record
Technical detail
CVSS v3.1
9.8 ยท CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.11639 ยท 96.1th percentile
Published
2021-03-11T21:15Z
Affected products (10)
ProductVersionsFixed in
microsoft/windows_server_2008all versionsโ€”
microsoft/windows_server_2008all versionsโ€”
microsoft/windows_server_2008all versionsโ€”
microsoft/windows_server_2012all versionsโ€”
microsoft/windows_server_2012all versionsโ€”
microsoft/windows_server_2016all versionsโ€”
microsoft/windows_server_2016all versionsโ€”
microsoft/windows_server_2016all versionsโ€”
microsoft/windows_server_2016all versionsโ€”
microsoft/windows_server_2019all versionsโ€”
References (2)
EPSS history
Timeline
  • 11 MAR 15:43Z
    Windows DNS Server Remote Code Execution Vulnerability
    cvelistv5