# CERT-FR Flags Samba Vulnerability CVE-2026-109411

Published: 2026-10-28 · Severity: routine
Canonical: https://vorant.io/reports/9923e4b4-0271-5896-8351-f711b24fbe4d/cert-fr-flags-samba-vulnerability-cve-2026-109411
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> A Samba flaw before version 4.25.1 lets attackers breach confidentiality, integrity, and bypass security policy; patch required.

Source: cert.cyber.gouv.fr — https://www.cert.cyber.gouv.fr/avis/CERTFR-2026-AVI-1400

## What to check

- Applies to: The 1 CVE named below. Whether you run an affected version is not assessed: check the versions the source lists.
- Exploitation: No exploitation in the wild and no public exploit is recorded for the CVEs named.

CERT-FR issued an advisory regarding a vulnerability in Samba affecting all versions prior to 4.25.1. The flaw, tracked as CVE-2026-109411, allows an attacker to compromise data confidentiality, violate data integrity, and bypass security policy controls. No further technical details on the exploitation vector or in-the-wild activity were provided in the advisory.

Defenders running affected Samba versions should consult the official Samba security bulletin and apply the available patch to update to version 4.25.1 or later. As Samba is widely used for file and print services and Active Directory domain controller functionality in mixed Windows/Linux environments, unpatched instances could expose sensitive data or allow unauthorized access.

## Mentioned in this report

- Vulnerabilities: CVE-2026-109411

Source reporting: https://www.cert.cyber.gouv.fr/avis/CERTFR-2026-AVI-1400

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