Executive Summary

Samba’s certificate auto‑enrollment Group Policy can fetch a CA certificate over plain HTTP and install it into the local trust store without verification. An attacker who can intercept or redirect traffic can supply a malicious CA, enabling man‑in‑the‑middle attacks or spoofing of trusted communications. This flaw allows an attacker to subvert TLS trust on Samba‑enabled systems.

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Authoritative CVE Metadata - CVSS Base Score: 8.0 (HIGH) - Published: 2026-05-27T11:16:18.357 - Last Modified: 2026-09-28T02:17:23.847

Original Description: A flaw was found in Samba’s certificate auto-enrollment Group Policy handling. When certificate auto-enrollment is enabled, Samba may retrieve a CA certificate over an unencrypted HTTP connection and install it into the local trust store without proper verification. An attacker with the ability to intercept or redirect network traffic could exploit this behavior to supply a malicious certificate authority certificate, potentially allowing interception or spoofing of trusted communications.

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