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HIGH

CVE-2026-1933

CVSS v3

7.1

HIGH

EPSS Score

0.9 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • sambaAlmaLinux:10all versions · fixed in 4.23.5-109.el10_2and 36 other packages
  • sambaAlmaLinux:9all versions · fixed in 4.23.5-10.el9_8and 36 other packages

Vendor advisories

  • CVE-2026-1933 Red Hat Product Security3,937 products fixed · 59 known affected

    samba: Missing access check on reparse point operations

    libsmbclient as a component of Red Hat Enterprise Linux 6 · libsmbclient-devel as a component of Red Hat Enterprise Linux 6 · samba as a component of Red Hat Enterprise Linux 6

  • RHSA-2026:65839 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.13.71 bug fix and security update

  • RHSA-2026:59831 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.12.97 bug fix and security update

  • RHSA-2026:60019 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.17.57 bug fix and security update

  • RHSA-2026:56853 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.16.69 bug fix and security update

  • RHSA-2026:56786 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.14.72 bug fix and security update

15 more advisories

Full record on NVD

Description

A flaw was found in Samba’s handling of NTFS-style reparse points on shares configured with read only = yes. Due to missing SMB-layer access checks, authenticated users with underlying filesystem write permissions may create or delete reparse point metadata through SMB operations even on read-only exports. This could allow modification of SMB-visible file behavior, including converting files into symbolic links or other reparse point types.

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
Published
2026-05-27
Last Modified
2026-08-19

Frequently asked questions

What is CVE-2026-1933?

A flaw was found in Samba’s handling of NTFS-style reparse points on shares configured with read only = yes. Due to missing SMB-layer access checks, authenticated users with underlying filesystem write permissions may create or delete reparse point metadata through SMB operations even on read-only exports. This could allow modification of SMB-visible file behavior, including converting files into symbolic links or other reparse point types.

Is CVE-2026-1933 actively exploited?

Active exploitation of CVE-2026-1933 has not been confirmed. Its EPSS score was 0.9% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-1933?

CVE-2026-1933 has a CVSS v3 base score of 7.1 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H.

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