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CVE-2016-2124

22
FAUCET Score

CVE-2016-2124 describes a flaw in Samba's SMB1 authentication, allowing an attacker to intercept plaintext passwords even when Kerberos was mandated. This medium-severity vulnerability (CVSS 5.9) has a network attack vector and high confidentiality impact, but requires high attack complexity. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this issue.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.0.0, < 4.13.14CPE matchmatch criteria
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
>= 4.14.0, < 4.14.10CPE matchmatch criteria
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
>= 4.15.0, < 4.15.2CPE matchmatch criteria
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.9MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.75%
Probability of exploitation in next 30 days
EPSS Percentile
75.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0175 is in the 54th percentile among its peer group of 19,954 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (14)

microsoftpatch availablevia msrc
Product: 16864-17084Fixed in: 4.18.3-1
microsoftpatch availablevia msrc
Product: 16864-16817Fixed in: 4.18.3-1
microsoftpatch availablevia msrc
Product: 16863-16823Fixed in: 4.12.5-6
microsoftpatch availablevia msrc
Product: azl3 samba 4.18.3-1 on Azure Linux 3.0Fixed in: 4.18.3-1
microsoftpatch availablevia msrc
Product: cbl2 samba 4.12.5-6 on CBL Mariner 2.0Fixed in: 4.12.5-6
microsoftpatch availablevia msrc
Product: Azure Linux 3.0 x64Fixed in: 4.18.3-1
microsoftpatch availablevia msrc
Product: Azure Linux 3.0 ARMFixed in: 4.18.3-1
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.4 Extended Update SupportFixed in: samba-0:4.13.3-8.el8_4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: samba-0:4.10.16-17.el7_9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: samba-0:4.14.5-7.el8_5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.2 Extended Update SupportFixed in: samba-0:4.11.2-18.el8_2
View patch
redhatpatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Gluster Storage 3.5 for RHEL 7Fixed in: samba-0:4.11.6-114.el7rhgs
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Gluster Storage 3.5 for RHEL 8Fixed in: samba-0:4.14.5-204.el8rhgs
View patch

Vendor Advisories (3)

microsoft2024-Oct/CVE-2016-2124

CVE-2016-2124

Oct 8, 2024
microsoft2022-Feb/CVE-2016-2124Moderate

A flaw was found in the way samba implemented SMB1 authentication. An attacker could use this flaw to retrieve the plaintext password sent over the wire even if Kerberos authentication was required.

Feb 8, 2022
redhatCVE-2016-2124Moderate

samba: SMB1 client connections can be downgraded to plaintext authentication

Nov 9, 2021

References

bugzilla.redhat.com / show_bug.cgi
Issue TrackingPatchThird Party Advisory
lists.debian.org / debian-lts-announce/2023/09/msg00013.html
security.gentoo.org / glsa/202309-06
samba.org / samba/security/CVE-2016-2124.html
MitigationVendor Advisory