What is CVE-2018-1057?

CVE-2018-1057 is a high-severity vulnerability in Samba, classified under Incorrect Authorization. CVSS score: 8.8/10. Published 2018-03-13.

How severe is CVE-2018-1057?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2018-1057 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in Samba

CVE-2018-1057

On a Samba 4 AD DC the LDAP server in all versions of Samba from 4.0.0 onwards incorrectly validates permissions to modify passwords over LDAP allowing authenticated users to change any other users' passwords, including administrative users and privileged service accounts (eg Domain Controllers).

Vulnerability class: Broken Access Control

Published 2018-03-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.100 (95.5th percentile), scored 2026-09-29.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 95th percentile — 95.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.100 · newest: 0.100 · change: 0.000

Affected products

Samba — versions All versions of Samba from 4.0.0 onwards.
Canonical Ubuntu Linux — versions 14.04, 16.04, 17.10
Debian Linux — versions 8.0

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

Public proof-of-concept exploits

noegythnibin/links

References

www.securityfocus.com/bid/103382 (VDB Entry, Third Party Advisory, vdb-entry)
www.debian.org/security/2018/dsa-4135 (vendor-advisory, Third Party Advisory)
usn.ubuntu.com/3595-1/ (vendor-advisory, Third Party Advisory)
www.securitytracker.com/id/1040494 (VDB Entry, Third Party Advisory, vdb-entry)
security.gentoo.org/glsa/201805-07 (vendor-advisory, Third Party Advisory)
security.netapp.com/advisory/ntap-20180313-0001/ (Third Party Advisory)
www.samba.org/samba/security/CVE-2018-1057.html (Mitigation, Vendor Advisory)
bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
www.synology.com/support/security/Synology_SA_18_08 (Third Party Advisory)
lists.debian.org/debian-lts-announce/2019/04/msg00013.html (mailing-list, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2018-1057?: CVE-2018-1057 is a high-severity vulnerability in Samba, classified under Incorrect Authorization. CVSS score: 8.8/10. Published 2018-03-13.
How severe is CVE-2018-1057?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2018-1057 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.