CVE-2023-21758

Name: CVE-2023-21758
Creator: NVD / NIST
Published: 2023-01-10T22:15:18.74+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 92.53%

Last modified Jun 17, 2026

CVE-2023-21758 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Windows Internet Key Exchange (IKE) Extension Denial of Service Vulnerability. EPSS estimates a 92.53% chance of exploitation in the next 30 days.

Description

Windows Internet Key Exchange (IKE) Extension 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

92.53%

99.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-476

Affected Software

Vendor	Product	Versions
Microsoft	Windows 10	All versions
Microsoft	Windows 10	20h2
Microsoft	Windows 10	21h2
Microsoft	Windows 10	22h2
Microsoft	Windows 10	1607
Microsoft	Windows 10	1809
Microsoft	Windows 11	All versions
Microsoft	Windows 11	21h2
Microsoft	Windows 11	22h2
Microsoft	Windows Server 2016	All versions
Microsoft	Windows Server 2019	All versions
Microsoft	Windows Server 2022	All versions

References

Timeline

Published: Jan 10, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-21758?

Windows Internet Key Exchange (IKE) Extension Denial of Service Vulnerability

How severe is CVE-2023-21758?

CVE-2023-21758 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 92.53% probability of exploitation in the next 30 days.

How do I fix CVE-2023-21758?

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-2023-21758?

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

Scan your code now

Source: NVD / NIST