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CVE Record

CVE-2026-1933: Samba: missing access check on reparse point operations

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.

HighCVSS 7.1Not KEV-listedUpdated
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Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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ATT&CK lookup starting points

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cwe · medium confidence lookup

CWE-284: Authorization and privilege behavior lookup

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description · low confidence lookup

Container behavior lookup

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CVE-2026-1933 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.1 (3.1)
Known Exploited
No
Published

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

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

2CVSS vectors
7Timeline events
2ADP providers
25Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

CVSS vector scores

2 official scores

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
7.1CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H2.84.2redhat
7.1CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H2.84.2redhat-SADP

Vulnerability scoring details

Base CVSS 3.1 score

7.1High
CVSS 3.1 vector shape for CVE-2026-1933Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. ADP timelineredhat-SADP

    Reported to Red Hat.

  3. Source timelineredhat

    Reported to Red Hat.

  4. ADP timelineredhat-SADP

    Made public.

  5. Source timelineredhat

    Made public.

  6. CVE publishedCVE Program

    The CVE record was published.

  7. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc
redhat-SADPsamba: Missing access check on reparse point operations
other:Red Hat severity ratingcvssV3_1
  • 2026-03-13T08:29:39.852Z: Reported to Red Hat.
  • 2026-05-27T12:08:33.095Z: Made public.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Red HatRed Hat Enterprise Linux 10samba, 0:4.23.5-109.el10_2affected
Red HatRed Hat Enterprise Linux 10.0 Extended Update Supportsamba, 0:4.21.3-114.el10_0.1affected
Red HatRed Hat Enterprise Linux 8samba, 0:4.19.4-16.el8_10affected
Red HatRed Hat Enterprise Linux 8samba, 0:4.19.4-16.el8_10affected
Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update Supportsamba, 0:4.15.5-16.el8_6.1affected
Red HatRed Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-Onsamba, 0:4.15.5-16.el8_6.1affected
Red HatRed Hat Enterprise Linux 8.8 Telecommunications Update Servicesamba, 0:4.17.5-7.el8_8.1affected
Red HatRed Hat Enterprise Linux 8.8 Update Services for SAP Solutionssamba, 0:4.17.5-7.el8_8.1affected
Red HatRed Hat Enterprise Linux 9samba, 0:4.23.5-10.el9_8affected
Red HatRed Hat Enterprise Linux 9samba, 0:4.23.5-10.el9_8affected
Red HatRed Hat Enterprise Linux 9.2 Update Services for SAP Solutionssamba, 0:4.17.5-105.el9_2.5affected
Red HatRed Hat Enterprise Linux 9.4 Update Services for SAP Solutionssamba, 0:4.19.4-105.el9_4.4affected
Red HatRed Hat Enterprise Linux 9.6 Extended Update Supportsamba, 0:4.21.3-14.el9_6.1affected
Red HatRed Hat OpenShift Container Platform 4.12openshift/ose-rhel-coreos-8, 412.86.202608241157-0affected
Red HatRed Hat OpenShift Container Platform 4.13openshift/ose-rhel-coreos-9, 413.92.202609080414-0affected
Red HatRed Hat OpenShift Container Platform 4.14openshift/ose-rhel-coreos-9, 414.92.202608172040-0affected
Red HatRed Hat OpenShift Container Platform 4.15openshift/ose-rhel-coreos-9, 415.92.202608180329-0affected
Red HatRed Hat OpenShift Container Platform 4.16openshift/ose-rhel-coreos-9, 416.94.202608150307-0affected
Red HatRed Hat OpenShift Container Platform 4.17openshift/ose-rhel-coreos-9, 417.94.202608250221-0affected
Red HatRed Hat OpenShift Container Platform 4.18openshift/ose-rhel-coreos-9, 418.94.202608142238-0affected
Red HatRed Hat OpenShift Container Platform 4.19openshift/ose-rhel-coreos-9, 4.19.9.6.202606241344-0affected
Red HatRed Hat OpenShift Container Platform 4.20openshift/ose-rhel-coreos-9, 4.20.9.6.202608121719-0affected
Red HatRed Hat OpenShift Container Platform 4.21openshift/ose-rhel-coreos-9, 4.21.9.6.202608122143-0affected
Red HatRed Hat OpenShift Container Platform 4.22openshift/ose-rhel-coreos-9, 4.22.9.8.202608130832-0affected
Red HatRed Hat Enterprise Linux 6sambaunknown
Red HatRed Hat Enterprise Linux 6samba4unknown
Red HatRed Hat Enterprise Linux 7sambaaffected
Weakness

CWE details

CWE-284

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-284 · source CWE mapping

Improper Access Control

Improper Access Control represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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