CVE-2020-10745

Name: CVE-2020-10745
Creator: NVD / NIST
Published: 2020-07-07T14:15:11.007+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 3.87%

Last modified Jun 17, 2026

CVE-2020-10745 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A flaw was found in all Samba versions before 4.10.17, before 4.11.11 and before 4.12.4 in the way it processed NetBios over TCP/IP. This flaw allows a remote attacker could to cause the Samba server to consume excessive CPU use, resulting in a denial of service. EPSS estimates a 3.87% chance of exploitation in the next 30 days.

Description

A flaw was found in all Samba versions before 4.10.17, before 4.11.11 and before 4.12.4 in the way it processed NetBios over TCP/IP. This flaw allows a remote attacker could to cause the Samba server to consume excessive CPU use, resulting in a denial of service. This highest threat from this vulnerability is to system availability.

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

3.87%

88.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-400

Affected Software

Vendor	Product	Versions
Samba	Samba	>= 4.0.0, < 4.10.17
Samba	Samba	>= 4.11.0, < 4.11.11
Samba	Samba	>= 4.12.0, < 4.12.4
Fedoraproject	Fedora	31
Opensuse	Leap	15.1
Opensuse	Leap	15.2
Debian	Debian Linux	9.0

References

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00030.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00054.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00002.htmlMailing List, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1849491%3B
https://lists.debian.org/debian-lts-announce/2020/11/msg00041.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6YLNQ5GRXUKYRUAOFZ4DUBVN4SMTL6Q2/
https://security.gentoo.org/glsa/202007-15Third Party Advisory
https://www.samba.org/samba/security/CVE-2020-10745.htmlVendor Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00030.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00054.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00002.htmlMailing List, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1849491%3B
https://lists.debian.org/debian-lts-announce/2020/11/msg00041.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6YLNQ5GRXUKYRUAOFZ4DUBVN4SMTL6Q2/
https://security.gentoo.org/glsa/202007-15Third Party Advisory
https://www.samba.org/samba/security/CVE-2020-10745.htmlVendor Advisory

Timeline

Published: Jul 7, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-10745?

How severe is CVE-2020-10745?

CVE-2020-10745 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 3.87% probability of exploitation in the next 30 days.

How do I fix CVE-2020-10745?

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-2020-10745?

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

Scan your code now

Source: NVD / NIST