CVE-2021-23192

Name: CVE-2021-23192
Creator: NVD / NIST
Published: 2022-03-02T23:15:08.403+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.91%

Last modified Jun 17, 2026

CVE-2021-23192 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A flaw was found in the way samba implemented DCE/RPC. If a client to a Samba server sent a very large DCE/RPC request, and chose to fragment it, an attacker could replace later fragments with their own data, bypassing the signature requirements.. EPSS estimates a 1.91% chance of exploitation in the next 30 days.

Description

A flaw was found in the way samba implemented DCE/RPC. If a client to a Samba server sent a very large DCE/RPC request, and chose to fragment it, an attacker could replace later fragments with their own data, bypassing the signature requirements.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.91%

77.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Samba	Samba	>= 4.10.0, < 4.13.14
Samba	Samba	>= 4.14.0, < 4.14.10
Samba	Samba	>= 4.15.0, < 4.15.2

References

https://bugzilla.redhat.com/show_bug.cgi?id=2019666Issue Tracking, Third Party Advisory
https://security.gentoo.org/glsa/202309-06
https://ubuntu.com/security/CVE-2021-23192Third Party Advisory
https://www.samba.org/samba/security/CVE-2021-23192.htmlPatch, Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2019666Issue Tracking, Third Party Advisory
https://security.gentoo.org/glsa/202309-06
https://ubuntu.com/security/CVE-2021-23192Third Party Advisory
https://www.samba.org/samba/security/CVE-2021-23192.htmlPatch, Vendor Advisory

Timeline

Published: Mar 2, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-23192?

How severe is CVE-2021-23192?

CVE-2021-23192 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.91% probability of exploitation in the next 30 days.

How do I fix CVE-2021-23192?

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-2021-23192?

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

Scan your code now

Source: NVD / NIST