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CVE-2016-2125

27
FAUCET Score

CVE-2016-2125 describes a vulnerability in Samba versions prior to 4.5.3, 4.4.8, and 4.3.13, where Kerberos authentication always requested forwardable tickets. This allowed a malicious service, to which Samba authenticated, to impersonate Samba to other services or domain users. With a CVSS score of 6.5 (Medium), this vulnerability has an adjacent attack vector and low attack complexity, potentially leading to high confidentiality impact. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.0.25, < 4.3.13CPE matchmatch criteria
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
>= 4.4.0, < 4.4.8CPE matchmatch criteria
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
>= 4.5.0, < 4.5.3CPE matchmatch criteria
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
3.0CPE matchmatch criteria
cpe:2.3:a:redhat:gluster_storage:3.0:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.4MEDIUM

CVSS:3.0/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

Attack Vector
ADJACENT_NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
1.2
Impact Score
5.2
CvssVersion
3.0

Exploit Intelligence

EPSS Score
9.20%
Probability of exploitation in next 30 days
EPSS Percentile
94.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0920 is in the 99th percentile among its peer group of 1,801 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (8)

redhatpatch availablevia redhat_api
Product: Red Hat Gluster Storage 3.2 for RHEL 7Fixed in: samba-0:4.4.6-4.el7rhgs
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: samba-0:3.6.23-41.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: samba4-0:4.2.10-9.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: samba-0:4.4.4-13.el7_3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Gluster Storage 3.2 for RHEL 6Fixed in: samba-0:4.4.6-4.el6rhs
View patch
redhatworkaround availablevia nvd_reference
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: samba
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: samba3x

Vendor Advisories (1)

redhatCVE-2016-2125Moderate

samba: Unconditional privilege delegation to Kerberos servers in trusted realms

Dec 19, 2016

References

rhn.redhat.com / errata/RHSA-2017-0494.html
Third Party Advisory
rhn.redhat.com / errata/RHSA-2017-0495.html
Third Party Advisory
rhn.redhat.com / errata/RHSA-2017-0662.html
Third Party Advisory
rhn.redhat.com / errata/RHSA-2017-0744.html
Third Party Advisory
access.redhat.com / errata/RHSA-2017:1265
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingMitigationThird Party Advisory
samba.org / samba/security/CVE-2016-2125.html
MitigationPatchVendor Advisory
securityfocus.com / bid/94988
Third Party AdvisoryVDB Entry
securitytracker.com / id/1037494
Third Party AdvisoryVDB Entry