CVE-2021-26894

CVE-2021-26894

Critical Β· published March 11, 2021

CVSS v3.1
9.8
EPSS
8%
Percentile
94.6
In the wild
Unconfirmed
What it is

🚨 A remote code execution vulnerability in Windows DNS Server awaits your action! Just one missed patch could leave your entire network vulnerable! πŸ”₯ Think of the Windows DNS Server like your neighborhood post office, which holds the keys to all your mail routes. If an attacker can manipulate the system, it’s like giving them a master key to redirect all your parcels to the wrong addresses! An attacker could execute arbitrary code on the DNS server, giving them total control over your network. This means they could read sensitive data, alter communications, or even install malicious software undetected. The consequences could be absolutely devastating!

Put simply

Think of the Windows DNS Server like your neighborhood post office, which holds the keys to all your mail routes. If an attacker can manipulate the system, it’s like giving them a master key to redirect all your parcels to the wrong addresses! CVE-2021-26894 allows attackers to send specially crafted DNS requests that the server does not properly handle, leading to remote code execution. This vulnerability is particularly critical given its potential to compromise the whole DNS infrastructure.

What to do

An attacker could execute arbitrary code on the DNS server, giving them total control over your network. This means they could read sensitive data, alter communications, or even install malicious software undetected. The consequences could be absolutely devastating! Immediate action is essential: patch your Windows Server to the latest version where the vulnerability is addressed. Regularly review your security policies and ensure your environment is configured correctly to minimize risks. πŸ›‘οΈ You've got this! Follow these steps to safeguard your network and keep those pesky attackers at bay! πŸ’ͺ✨

The record
Technical detail
CVSS v3.1
9.8 Β· 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
0.07755 Β· 94.6th percentile
Published
2021-03-11T21:15Z
Affected products (10)
ProductVersionsFixed in
microsoft/windows_server_2008all versionsβ€”
microsoft/windows_server_2008all versionsβ€”
microsoft/windows_server_2008all versionsβ€”
microsoft/windows_server_2012all versionsβ€”
microsoft/windows_server_2012all versionsβ€”
microsoft/windows_server_2016all versionsβ€”
microsoft/windows_server_2016all versionsβ€”
microsoft/windows_server_2016all versionsβ€”
microsoft/windows_server_2016all versionsβ€”
microsoft/windows_server_2019all versionsβ€”
References (2)
EPSS history
Timeline
  • 11 MAR 15:43Z
    Windows DNS Server Remote Code Execution Vulnerability
    cvelistv5