CVE-2021-26424

CVE-2021-26424

Critical ยท published August 12, 2021

Patch now

High probability of exploitation

CVSS calls it critical at 9.9. It sits in the 99.2th percentile for exploit probability.

CVSS v3.1
9.9
EPSS
61%
Percentile
99.2
In the wild
Unconfirmed
What it is

๐Ÿšจ A single mismanaged packet could let an attacker execute code on affected Windows systems with no user interaction required! ๐Ÿ”ฅ Think of this vulnerability like a hidden trapdoor in a high-security building โ€” if someone knows the exact coordinates, they can waltz right in without anyone noticing. If exploited, an attacker could take complete control of the system, potentially leading to data theft, unauthorized access, or even total system compromise. Imagine losing the keys to your entire digital castle because someone slipped through the back door! This vulnerability is absolutely devastating and requires immediate attention.

Put simply

Think of this vulnerability like a hidden trapdoor in a high-security building โ€” if someone knows the exact coordinates, they can waltz right in without anyone noticing. This CVE is rooted in how Windows handles TCP/IP packets, allowing remote code execution when crafted maliciously. Essentially, the system trusts these packets too much, opening the door for attackers to run arbitrary code.

What to do

If exploited, an attacker could take complete control of the system, potentially leading to data theft, unauthorized access, or even total system compromise. Imagine losing the keys to your entire digital castle because someone slipped through the back door! This vulnerability is absolutely devastating and requires immediate attention. To protect against this threat, immediately patch to the latest Windows update that addresses CVE-2021-26424. Ensure your firewall is configured to monitor unusual traffic patterns and consider implementing network segmentation to limit exposure. Regularly audit your systems for potential vulnerabilities. You can tackle this! Follow the steps, secure your systems, and you'll be back in the safety zone in no time! ๐Ÿ›ก๏ธ

The record
Technical detail
CVSS v3.1
9.9 ยท CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.61133 ยท 99.2th percentile
Published
2021-08-12T22:15Z
Affected products (18)
ProductVersionsFixed in
microsoft/windows_10all versionsโ€”
microsoft/windows_10all versionsโ€”
microsoft/windows_10all versionsโ€”
microsoft/windows_10all versionsโ€”
microsoft/windows_10all versionsโ€”
microsoft/windows_10all versionsโ€”
microsoft/windows_10all versionsโ€”
microsoft/windows_7all versionsโ€”
microsoft/windows_8.1all versionsโ€”
microsoft/windows_rt_8.1all 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_2019all versionsโ€”
References (2)
EPSS history
Timeline
  • 12 AUG 18:11Z
    Windows TCP/IP Remote Code Execution Vulnerability
    cvelistv5