CVE-2023-21547

Name: CVE-2023-21547
Creator: NVD / NIST
Published: 2023-01-10T22:15:15.383+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 88.23%

Last modified Jun 17, 2026

CVE-2023-21547 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Internet Key Exchange (IKE) Protocol Denial of Service Vulnerability. EPSS estimates a 88.23% chance of exploitation in the next 30 days.

Description

Internet Key Exchange (IKE) Protocol 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

88.23%

99.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Microsoft	Windows 10 1607	All versions
Microsoft	Windows 10 1809	All versions
Microsoft	Windows 10 21h2	All versions
Microsoft	Windows 10 22h2	All versions
Microsoft	Windows 11 21h2	All versions
Microsoft	Windows 11 22h2	All versions
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-2023-21547?

Internet Key Exchange (IKE) Protocol Denial of Service Vulnerability

How severe is CVE-2023-21547?

CVE-2023-21547 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 88.23% probability of exploitation in the next 30 days.

How do I fix CVE-2023-21547?

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-2023-21547?

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

Scan your code now

Source: NVD / NIST