CVE-2023-21819

Name: CVE-2023-21819
Creator: NVD / NIST
Published: 2023-02-14T20:15:16.457+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 30.81%

Last modified Jun 17, 2026

CVE-2023-21819 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Windows Secure Channel Denial of Service Vulnerability. EPSS estimates a 30.81% chance of exploitation in the next 30 days.

Description

Windows Secure Channel Denial of Service Vulnerability

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

30.81%

98.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-125

Affected Software

Vendor	Product	Versions
Microsoft	Windows 10 1809	< 10.0.17763.4010
Microsoft	Windows 10 20h2	< 10.0.19042.2604
Microsoft	Windows 10 21h2	< 10.0.19044.2604
Microsoft	Windows 10 22h2	< 10.0.19045.2604
Microsoft	Windows 11 21h2	< 10.0.22000.1574
Microsoft	Windows Server 2019	All versions
Microsoft	Windows Server 2022	All versions

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21819Patch, Vendor Advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21819Patch, Vendor Advisory

Timeline

Published: Feb 14, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-21819?

Windows Secure Channel Denial of Service Vulnerability

How severe is CVE-2023-21819?

CVE-2023-21819 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 30.81% probability of exploitation in the next 30 days.

How do I fix CVE-2023-21819?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-21819?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST