CVE-2023-32021

Name: CVE-2023-32021
Creator: NVD / NIST
Published: 2023-06-14T00:15:11.62+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.1/10EPSS 1.20%

Last modified Jun 17, 2026

CVE-2023-32021 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. Windows SMB Witness Service Security Feature Bypass Vulnerability. EPSS estimates a 1.20% chance of exploitation in the next 30 days.

Description

Windows SMB Witness Service Security Feature Bypass Vulnerability

Metrics

CVSS 3.1

7.1/10

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

EPSS Probability

1.20%

64.3th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Microsoft	Windows Server 2012	r2
Microsoft	Windows Server 2016	All versions
Microsoft	Windows Server 2019	All versions
Microsoft	Windows Server 2022	All versions

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-32021Mitigation, Patch, Vendor Advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-32021Mitigation, Patch, Vendor Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2023-32021?

Windows SMB Witness Service Security Feature Bypass Vulnerability

How severe is CVE-2023-32021?

CVE-2023-32021 has a CVSS score of 7.1/10 (HIGH severity). The EPSS model estimates a 1.20% probability of exploitation in the next 30 days.

How do I fix CVE-2023-32021?

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-2023-32021?

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

Scan your code now

Source: NVD / NIST