cvedb.io
CVE-2026-12249
CRITICAL · CVSS 9
EPSS exploitation probability: 0%
Published 2026-06-22T18:16:31.917 · Last modified 2026-06-22T20:18:53.300

Summary

An issue was discovered in Canonical ADSys upstream versions through v0.16.2. During Active Directory Certificate Services (AD CS) certificate auto-enrollment via the vendored Samba client script (internal/policies/certificate/python/vendor_samba/gp/gp_cert_auto_enroll_ext.py), ADSys utilizes a plaintext HTTP connection (http://) instead of a secure HTTPS connection (https://) to request the CA certificate from the Active Directory Certificate Services server (GetCACert). An unauthenticated network attacker positioned between the managed Ubuntu host and the configured AD CS CA hostname can conduct a Man-in-the-Middle (MITM) attack. By intercepting the plaintext HTTP request, the attacker can supply an arbitrary, attacker-controlled Root CA certificate. Because the system automatically acce

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.